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

摘要

An on-line bismuth preconcentration and determination system implemented with hydride generation inductively ::oupled plasma atomic emission spectrometry (HG-ICP-AES) associated to flow injection (PI) was studied. Quinolin-8-o1 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 mI of aqueous solution was 0.02 ng ml- 1 with a relative standard deviation (R.S.D.) of 3.5%, calculated from the peak lleights obtained. The calibration graph using the preconcentration system for bismuth was linear with a correlation ::oefficient of 0.999 at levels near the detection limits up to at least loo ng ml-1. The method was successfully applied to the determination of bismuth in human urine samples.