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KMID : 0895419980080020186
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Journal of Korean Society of Occupational and Enviromental Hygiene
1998 Volume.8 No. 2 p.186 ~ p.195
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The Recommendation of Sampling Method for Airborne MWF in Workplace
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Abstract
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The objective of this study was to determine if MWF(metalworking fluids) mass sampled on PVC filter lose during flowing airstream and desiccating and to present direction to correct the underestimated MWF mass. Flowing airstream caused MWF sampled on PVC filter to be breakthrough and lost. Loss of MWF on PVC filter increased in proportion to time of flowing airstream. Meanwhile, loss of MWF was observed during desiccating without flowing airstream. Vapor pressure of MWF is so low that it would not normally be thought to evaporate. However, MWF mist sampled on PVC filter has so great a surface area that loss by flowing airstream and evaporation can be appreciable. Loss between fresh and used MWF was also different. Those study results mean that NIOSH method(#0500 method) to take airborne MWF mist with PVC filter is not valid. Media to sample airborne MWF accurately still have not been introduced. It seems to be needed to estimate how much MWF on PVC filter may be lost during sampling. Regression model between sampling time including 1 day desiccating and total loss of MWF was $quot;Total loss(%)=18.4%+0.06 sampling time(p=0.000, r2=49.6%)$quot;. This model help correct MWF lost when one measures airborne MWF using NIOSH # 0500 method
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KEYWORD
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