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KMID : 0382420020280020109
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Korean Journal of Environmental Health Society
2002 Volume.28 No. 2 p.109 ~ p.116
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Field Validation of a Sampling and Analytical Method Developed for Preventing Airborne Hexavalent Chromium Collected on PVC Filterfrom Reduction
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Shin Yong-Chul
Paik Nam-Won
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Abstract
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The purpose of this study was to evaluate a new sampling and analytical method for the determination of airborne hexavalent chromium, Cr(VI), in a field plating operation. The procedures of this new method (Shin & Paik’s Method) are as the following: Airborne hexavalent chromium is collected on polyvinyl chloride (PVC) filter according to the National Institute for Occupational Safety and Health (NIOSH) Method 7600, and the filter sample is placed in a screw-capped vial and soaked with 2% NaOH/3% Na²CO₃solution immediately after sampling. The Cr(VI) sample is analyzed by ion chromatography/visible spectrophotometry (IC/VS) according to the U.S. Environmental Protection Agency (EPA) Method 218.6. The airborne Cr(VI) concentrations measured by this method were compared with those determined by three reference methods: One (NIOSH/EPA Method) consisted of sampling airborne Cr(VI) on PVC filters and storing the sample filters in screw-capped vials according to the NIOSH method, and analyzing Cr(VI) in samples using IC/VS according to the EPA method. The second method (lmpinger Method/NaHCO³) consisted of absorbing airborne Cr(VI) into 0.02 M NaHCO₃ solution in midget impinger, and analyzing the Cr(VI) in samples using ICNS. The third method was the OSHA Method 1D-215. Using these four different methods, four replicates of air samples were collected at an electroplating process and analyzed simultaneously. Two-way ANOV A and paired t-test were used to test difference among values determined by the methods. There was no significant difference and a strong correlation (r²=0.99) between Cr(VI) concentrations measured by the Shin & Paik’s Method and an impinger method (p>O.05L However, Cr(VI) concentrations determined by Shin & Paik’s Method were significantly different from those by the NIOSH/EPA Method (p
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