Elastomeric, half-facepiece, air-purifying respirator performance in a lead battery plant.
This workplace protection factor (WPF) study of a half facepiece air-purifying respirator with P100 filters was done in a lead battery manufacturing plant. Paired air samples for lead were collected inside and outside respirators worn by workers who were properly trained and quantitatively fit teste...
| Published in: | Journal of Occupational & Environmental Hygiene Vol. 7; no. 1; pp. 46 - 54 |
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| Main Authors: | , |
| Format: | equations & formulas research tables/charts Journal Article |
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Taylor & Francis Ltd
Jan2010
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105245163&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105245163 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15459624 V1L jtl: Journal of Occupational & Environmental Hygiene issn: 15459624 maglogo: Y pubinfo: dt: Jan2010 vid: 7 iid: 1 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 105245163 2010473038 10.1080/15459620903373537 NLM19904659 105245163 ppf: 46 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Elastomeric, half-facepiece, air-purifying respirator performance in a lead battery plant. aug: au: Janssen L McCullough NV affil: Larry Janssen Consulting, Stillwater, Minnesota sug: subj: Air Pollution Lead Analysis Particulate Matter Analysis Respiratory Protective Devices Blue Collar Workers Education, Continuing (Credit) Human Industry Microscopy, Electron, Scanning Occupational Safety Equipment and Supplies Paired T-Tests Two-Tailed Test ab: This workplace protection factor (WPF) study of a half facepiece air-purifying respirator with P100 filters was done in a lead battery manufacturing plant. Paired air samples for lead were collected inside and outside respirators worn by workers who were properly trained and quantitatively fit tested. Of the 45 valid sample sets, only four had detectable lead on the inside sample. WPFs were calculated for these sample pairs by dividing the outside sample lead concentration (Co) by the inside concentration (Ci). For the remaining 41 sample pairs, the detection limit for lead was used to calculate a maximum estimated Ci concentration. The Co for each of these sample pairs was divided by the Ci estimate to obtain a minimum WPF value. All the WPFs were rounded down to two significant figures, resulting in values ranging from 12 to > 2500. A rank and percentile procedure resulted in a 50th percentile WPF of 270 and a lower 5th percentile estimate > 50. These WPFs exceed the assigned protection factor of 10 for half facepieces published by the Occupational Safety and Health Administration. This study's results support the APF of 10 and indicate the respirator provided appropriate protection as it was used in this study. The comparability of the two analytical methods commonly used together in WPF studies was also evaluated. The samples collected outside the respirators were analyzed for lead by proton-induced X-ray emission analysis (PIXE) followed by inductively coupled plasma spectrometry (ICP). While the two methods were highly correlated (r2 = 0.965), the mean PIXE lead mass was approximately 45% higher than the mean ICP value. This systematic bias was explained by the assumptions used to interpret the PIXE analytical results. When WPF studies use ICP and PIXE for Co and Ci samples, respectively, the calculated WPF values are conservative estimates of respirator performance. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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