Determination of Pb in airborne particulate matter with a heavy matrix of silicon by SR-ETAAS

MARIANELA SAVIO; ROBERTO A. OLSINA; LUIS D. MARTINEZ; PATRICIA SMICHOWSKI; RAÚL A. GIL

MICROCHEMICAL JOURNAL

ELSEVIER SCIENCE BV

Año: 2010 vol. 96 p. 243 - 246

0026-265X

from urban and industrial areas of Argentina by electrothermal atomic absorption spectrometry with selfreversal background correction. For this sample with a heavy matrix of silicon, a simple acid treatment with aqua regia and HF is proposed aimed to minimize contamination and reduce sample treatment steps. Ultrasonic agitation was employed for sample homogenization. To overcome the problem of the high amounts of Si, main analytical variables including acid pretreatment conditions, temperature program of the graphite furnace and spectroscopic conditionswere carefully studied and optimized. Continuumsource and self-reversalmethods for background correctionwere compared in order to avoid non-specific and spectral interferences due to thematrix. After optimization, synthetic acid solutions of Pbwere employed for calibration. Calibrationwas linearwithin the range 1–40 ìg L−1 (correlation coefficient of 0.9995) when the 283.3 analytical line was used. Using optimized conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. After optimization, synthetic acid solutions of Pbwere employed for calibration. Calibrationwas linearwithin the range 1–40 ìg L−1 (correlation coefficient of 0.9995) when the 283.3 analytical line was used. Using optimized conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. After optimization, synthetic acid solutions of Pbwere employed for calibration. Calibrationwas linearwithin the range 1–40 ìg L−1 (correlation coefficient of 0.9995) when the 283.3 analytical line was used. Using optimized conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. fic and spectral interferences due to thematrix. After optimization, synthetic acid solutions of Pbwere employed for calibration. Calibrationwas linearwithin the range 1–40 ìg L−1 (correlation coefficient of 0.9995) when the 283.3 analytical line was used. Using optimized conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. conditions limits of detection (3ó) of 0.6 ìg L−1 were achieved. The repeatability between injections (Sr%) was evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same filter. In all cases the RSD was better than 6.9%. For checking accuracy, an aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. aliquot of a Standard ReferenceMaterial (NIST 2709, San Joaquin Soil) was subject to the same sample treatment and included in the overall analytical process. Thismethodwas successfully applied to the determination of Pb in airborne particulate matter collected in Buenos Aires city. evaluated andwas better than 4.2%. The precision (%RSD) for Pb determination in a single samplewas estimated by analyzing three strips of the same fi