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KMID : 1039220200300020087
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Journal of Korean Society of Occupational and Environmental Hygiene
2020 Volume.30 No. 2 p.87 ~ p.98
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Review of the Determination Methods for Metal Compounds with Different Occupational Exposure Limits Depending on Solubility
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Park Seung-Hyun
Ro Ji-Won
Jang Mi-Yeon
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Abstract
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Objective: The purpose of this study was to propose a sequential procedure for the simultaneous analysis of soluble and insoluble metal compounds.
Methods: Methods for sampling and analyzing metal compounds such as ISO standards, NIOSH methods, HSE methods, and OSHA methods were reviewed.
Results: Some metals have different OELs depending on the solubility of the compound. Therefore, we should take into account these characteristics and perform an exposure assessment. Soluble metal compounds are first extracted from the filter, and then the filter is digested by acids to analyze residual insoluble components. The extraction of soluble compounds can be completed by agitation for about 60 minutes with a leach solution (water) in a water bath at 37℃. For the analysis of insoluble compounds, the sample filter and the filtration filter remaining after the extraction of the soluble compounds are analyzed. This allows simultaneous determination of soluble and insoluble metal compounds. For hexavalent chromium compounds, soluble hexavalent chromium can first be extracted from the filter by using sulfate buffer. The insoluble hexavalent chromium remaining in the filter can then be extracted using carbonate buffer.
Conclusion: Workers are often exposed to many hazardous substances with different exposure limits at industrial sites. The OELs for compounds of the same metal can be set differently depending on solubility. This study can help evaluate a worker’s exposure to metal compounds by suggesting methods for the simultaneous determination of soluble and insoluble metal compounds.
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KEYWORD
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Determination, metal compound, occupational exposure limits, solubility
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