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KMID : 0355220070320040347
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Journal of Korean Academy Oral Medicine
2007 Volume.32 No. 4 p.347 ~ p.355
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Electrochemical Detection of Lead and Cadmium in Human Saliva by Anodic Stripping Voltammetry (ASV) Analysis: A Pilot Study
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Kim Young-Jun
Kim Cheol
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Abstract
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The aim of this study was to evaluate the differences of salivary lead (Pb) and cadmium (Cd) concentrations, using ASV analysis, after various pre-treatment procedures. 10 unstimulated whole saliva samples of non-exposed subjects to Pb and Cd were collected. Each sample was divided into 6 aliquots and centrifugation was performed in only 3 aliquots. After centrifugation, 3 different types of pre-treatment procedures were carried out. Also, these pre-treatment procedures were carried out for another 3 aliquots, without centrifugation. Pre-treated aliquots were analyzed electrochemically, by ASV. The results are as follows:
1. Mean concentration of Pb in saliva after centrifugation was significantly higher than that of non-centrifugation.
2. In the detection sensitivity of Pb in saliva, those of simple dilution technique by HCl and acid digestion technique by nitric acid were significantly higher than that of simple dilution technique by electrolyte.
3. Mean concentration of Cd in saliva after centrifugation was significantly higher than that of non-centrifugation.
4. In the detection sensitivity of Cd in saliva, those of simple dilution technique by HCl and acid digestion technique by nitric acid were higher than that of simple dilution technique by electrolyte. But, there were no significant differences between them.
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KEYWORD
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human saliva, lead, cadmium
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