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KMID : 0895420030130020113
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Journal of Korean Society of Occupational and Enviromental Hygiene
2003 Volume.13 No. 2 p.113 ~ p.118
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Reduction Rate of Hexavalent Chromium Mist in Air and on PVC Filter during Air Sampling in Field Plating Process
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Abstract
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Hexavalent chromium, Cr(Ⅵ),may reduce on polyvinyl chloride (PVC) filter during air sampling. This study was conducted to cstimate the reduction rate of Cr(Ⅵ) on PVC filter during air sampling and an correction equation for th loss of Cr(Ⅵ) by feduction in an industrial plating process. The reduction of Cr(Ⅵ) was progressed rapidly in 60 minutes and slowly thereafter. The empirical reduction rate of Cr(Ⅵ) (Y) over sampling time (X, min) was the following : Y= 0.916 -0.0208√x (r=0.73, p〈0.05). The loss of Cr(Ⅵ) caused by reduction during sampling can be corrected using the following empirical equation : Sc = S x 1/Y. where Sc = corrected value, S = analytical result, and Y= reduction rate of Cr(Ⅵ).
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