[Determination of trace amounts of copper by flow injection vapor generation AAS].
A method for the determination of copper by FI-VGAAS (flow injection vapor generation atomic absorption spectrometry) was developed. The sample solution containing trace amounts of o-phenanthroline and 0.1 mol.L-1 HNO3 was carried out by carrier of 0.1 mol.L-1 HNO3 and merged with sodium tetrahydroborate solution to produce the vapor species of copper, which got separation in gas-liquid separator and was detected in a quartz tube atomizer at 1000 degrees C. A detection limit of 1.8 micrograms.L-1 (3 sigma) of copper was obtained with a sampling frequency of 144/h using a sample volume of 500 microL. The precision RSD was 2.6% (n = 11) at the 100 micrograms.L-1 copper. The method was applied to the analysis of human hair and rice standard reference samples, the results were in good agreement with certified values.
Zhou
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H
Northeastern University, Box 332, Research Center for Analytical Sciences, 110006 Shenyang.
Xu
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Fang
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D001894:Borohydrides; D003300:Copper / Q000032:analysis*; D017022:Flow Injection Analysis / Q000379:methods; D006197:Hair / Q000737:chemistry*; D006801:Humans; D012275:Oryza / Q000737:chemistry; D010618:Phenanthrolines; D013054:Spectrophotometry, Atomic
D001894:Borohydrides; D010618:Phenanthrolines; D003300:Copper; C025364:sodium borohydride; C025205:1,10-phenanthroline