“On-Line Preconcentration / Determination of Lead Traces in Bee Honey by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) Using a Conical Minicolumn Packed with Activated Carbon”

S. CERUTTI, R. FERNÁNDEZ ORSI, J.A. GÁSQUEZ, R.A. OLSINA, L.D. MARTINEZ

JOURNAL OF TRACE AND MICROPROBE TECHNIQUES

Marcel Dekker

Año: 2003 vol. 21 p. 421 - 432

0733-4680

In this study, the preconcentration of Pb2þ using a conical minicolumn packedwith activated carbon (AC) was studied for preconcentration of Pb2þ. The experimentsshowed that Pb2+ reacts with 8-hydroxyquinoline to form a complex at pH 10.0 and can be retained ‘‘on-line’’ on a conical minicolumn packed with activated carbon, then eluted with 20% (v/v) nitric acid. The conditions for the quantitative and reproducible preconcentration and subsequent ICP-OES determination with ultrasonic nebulization system (USN) were studied. A total enhancement factor (N) of 500 was obtained with respect to ICP-OES usingpneumatic nebulization (10 for USN and 50 for enrichment factor) for a sample volume of 25 mL. The detection limit (DL) was 0.04 ugL-1. The relative standard deviation (RSD) were 3.0%. The optimized procedure was successfully applied to the determination of trace levels of Pb2+ in bee honey samples.