Validation of an Extraction Method for the Determination of Airborne MWFs using Alternative Solvents

대체용매를 이용한 금속가공유 측정방법 타당성 평가

  • Jeong, Jee Yeon (Dept. of Occupational and Environment Health, Yong-In University) ;
  • Baek, Nam Won (Department of Public Health, Seoul National University)
  • 정지연 (용인대학교 자연과학대학 산업환경보건학과) ;
  • 백남원 (서울대학교 보건대학원)
  • Received : 2006.03.14
  • Accepted : 2006.04.17
  • Published : 2006.06.30

Abstract

The purpose of this study was to validate alternative method by using non-carcinogenic, and less toxic solvents than NIOSH analytical method 5524 for measuring the airborne MWFs in workplaces. In laboratory tests, the ETM solvents(mixture of same volume for ethyl ether, toluene, and ethanol) were selected. The alternative method of analyzing MWFs, referred to as the ETM solvent extraction method, showed 0.04 mg/sample as LOD, and 0.15 mg/sample as LOQ. The analytical precision (pooled CV, coefficient of variation) of the ETM solvent extraction method for analyzing the straight, soluble, semisynthetic, and synthetic metalworking fluid was 1.5%, 2.0%, 2.6%, 1.6%, respectively, which was similar to the precision (2.6%) of NIOSH analytical method (NIOSH 0500) for total dust. The analytical accuracy by recovery test, spiked mass calculated as extractable mass, was almost 100%. As the result of storage stability test, metalworking fluid samples should be stored in refrigerated condition, and be analyzed in two weeks after sampling. The 95% confidence limit of the estimated total standard error for the ETM solvent extraction method for analyzing the straight, soluble, semisynthetic, and synthetic metalworking fluid was ${\pm}12.6%$, ${\pm}12.5%$, ${\pm}14.0%$, and ${\pm}13.6%$, respectively, which satisfied the OSHA sampling and analytical criteria.

Keywords

References

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