Journal of Korean Society of Occupational and Environmental Hygiene (한국산업보건학회지)

Korean Industrial Hygiene Association (한국산업보건학회)
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Reliability on Banana Oil Qualitative Fit Test for Quarter Mask

1/4 형 마스크에 대한 Banana Oil 밀착도 검사(QLFT)의 신뢰성

  • Han, Don-Hee (Department of Industrial Safety & System Engineering, Inje University) ;
  • Jeong, Yoon-Sok (Department of Industrial Safety & System Engineering, Inje University)
  • 한돈희 (인제대학교 산업안전시스템공학부) ;
  • 정윤석 (인제대학교 산업안전시스템공학부)
  • Published : 1999.11.30
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Abstract

A quantitative fit test, condensation nuclei counting (Portacount 8025, TSI), was performed concurrently with a banana oil (isoamyl acetate: IAA) qualitative fit test (MSA) to evaluate reliability on IAA QLFT and correlation between two methods. One brands of quarter mask (3M model 7500 medium) was prepared for QLFT with HEPA filter and gas & vapor removing media, i.e., combination cartridge. 110 subjects (65 male, 45 female) were fit tested QNFT and QLFT each three times. For a wearer combination having a FF<10, as determined by CNC QNFT, the point es timate (${\beta}$-error) of the probability of that combination not being rejected by the banana oil QLFT was found to be 0.0 with 95% confidence that this statistic is not expected to exceed 0.15. For a wearer combination having a FF<100, as determined by CNC QNFT, the point estimate of the probability of that combination not being rejected by the banana oil QLFT was found to be 0.07 with 95% confidence that this statistic is not expected to exceed 0.13. The uncertainty associated with each estimate, however, is large due to the small number of study subjects with inadequately fitting respirators.

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