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

An on-line bismuth preconcentration and determination system implemented wi th hydride generation inductively coupled plasma atomic emission spectromet ry (HG-ICP-AES) associated to flow injection (FI) was studied. Quinolin-8-o l and Amberlite XAD-7 were used for the retention of bismuth, at FH 4.5. Th e bismuth complex was removed from the micro-column with nitric acid. The d etection limit value for the preconcentration of 100 mi of aqueous solution was 0.02 ng ml(-1) with a relative standard deviation (R.S.D.) of 3.5%, ca lculated from the peak heights obtained. The calibration graph using the pr econcentration 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 hum an urine samples. (C) 2001 Elsevier Science B.V, All rights reserved.