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Causes of in-facepiece sampling bias - I. Half-facepiece respirators.

Authors
Myers-WR; Allender-JR; Iskander-W; Stanley-C
Source
Ann Occup Hyg 1988; 32(3):345-359
NIOSHTIC No.
00183781
Abstract
A study of the causes of in facepiece sampling bias was presented. The test agent was acetone (67641) vapor. Three half facepiece respirators from commercial sources were tested. The sampling bias for the three respirators was significantly different. Factors which had a significant effect on sampling bias were leak site, breathing pattern, probe location, probe depth, and leak site breathing pattern interactions. With two of the facepieces tested, the best sampling occurred when the probe was opposite the mouth; this was the worst sampling site for the other facepiece tested. The geometry, circular or slit type leaks, were not found to have an effect on sampling. Neither multiple leaks nor differences in leak rates had an effect on in facepiece sampling. The authors recommend that respirator testing and interpretation of results be evaluated carefully.
Keywords
NIOSH-Author; Respiratory-protection; Sampling-methods; Personal-protective-equipment; Respiratory-equipment; Air-sampling; Face-masks
CODEN
AOHYA3
CAS No.
67-64-1
Publication Date
19880101
Document Type
Journal Article
Fiscal Year
1988
NTIS Accession No.
NTIS Price
Issue of Publication
3
ISSN
0003-4878
NIOSH Division
DSR
Source Name
Annals of Occupational Hygiene
State
WV
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