On-line preconcentration system for bismuth determination in urine by flow injection hydride generation inductively coupled plasma atomic emission spectrometry

MOYANO, SUSANA; WUILLOUD, RODOLFO G.; OLSINA, ROBERTO A.; GÁSQUEZ, JOSÉ A.; MARTINEZ, LUIS D.

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Año: 2001 vol. 54 p. 211 - 219

0039-9140

An on-line bismuth preconcentration and determination system implemented with hydride generation inductively coupled plasma atomic emission spectrometry (HG-ICP-AES) associated to flow injection (FI) was studied. Quinolin-8-ol and Amberlite XAD-7 were used for the retention of bismuth, at pH 4.5. The bismuth complex was removed from the micro-column with nitric acid. The detection limit value for the preconcentration of 100 ml of aqueous solution was 0.02 ng ml-1 with a relative standard deviation (R.S.D.) of 3.5%, calculated from the peak heights obtained. The calibration graph using the preconcentration system for bismuth was linear with a correlation coefficient of 0.999 at levels near the detection limits up to at least 100 ng ml-1. The method was successfully applied to the determination of bismuth in human urine samples.