Affiliation:
1. Michigan Department of Agriculture, W. C. Geagley Laboratory, 1615 S. Harrison Rd., East Lansing, Mich. 48828
Abstract
Abstract
Thallium concentrations as low as 0.2 ppb may be easily and accurately measured with no sample preparation. The urine is pipetted directly into the electrolysis cell containing 0.1M HClO4 and deaerated; a 2 min electrolysis is performed, and the thallium is oxidized from the mercury-thallium amalgam, using differential pulse anodic stripping voltammetry. The standards are spiked thallium-free urine solutions; thus the samples and standards reflect each other closely, and as the standard curves are repeatable to within ± 5% (down to 2 ppb thallium), the recoveries range from 95 to 105%. Lead is not a serious interference; however, cadmium does interfere and a complexing agent must be used when determining traces of thallium in the presence of cadmium.
Publisher
Oxford University Press (OUP)
Cited by
2 articles.
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