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The effect of washing procedures on trace element content of human hair
Authors:Seppo Salmela  Erkki Vuori  Jukka O Kilpiö
Institution:Department of Public Health Science, University of Helsinki, Haartmaninkatu 3, SF-00290 Helsinki 29 Finland
Abstract:The effects of four washing procedures on the concentrations of manganese, iron, copper, zinc and cadmium and were investigated for three pooled samples of human head hair. The solutions evaluated were a non-ionic detergent (Triton X-100), an ionic detergent (sodium lauryl sulfate), acetone and a complexing agent (EDTA). The results indicate that for every element determined there is a level below which the concentration cannot be reduced by further washings. The numbers of washings required to reach these levels vary considerably. This effect must be considered in the trace element analysis of hair.
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