Reagent injection FIA system for lead determination by hydride generation - quartz-tube atomic absorption spectrometry.
A method is proposed for the determination of lead by generation of its hydride and detection by quartz-tube AAS using a reagent injection FIA system based on the injection of sodium tetrahydroborate. Lead hydride generation was carried out using a combination of 0.5 M nitric acid, 10% m/ v hydrogen peroxide and 10% m/ v sodium tetrahydroborate. The characteristic concentration obtained was 3.1 ng mL(-1) and the detection limit was 2.6 ng mL(-1) for an injected volume of 0.125 mL of tetrahydroborate.
Analytical Spectroscopy and Sensors Group, Department of Analytical Chemistry, University of Zaragoza, Spain.
M T
MT
Baranguan
F
F
Laborda
J R
JR
Castillo
D001894:Borohydrides; D017022:Flow Injection Analysis / Q000379:methods*; D006197:Hair / Q000737:chemistry*; D006801:Humans; D007854:Lead / Q000032:analysis* / Q000737:chemistry*; D009584:Nitrogen; D010084:Oxidation-Reduction; D011791:Quartz; D012680:Sensitivity and Specificity; D013054:Spectrophotometry, Atomic / Q000295:instrumentation* / Q000379:methods*
D001894:Borohydrides; D011791:Quartz; D007854:Lead; C025364:sodium borohydride; D009584:Nitrogen