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A new passive sampler for regulated workplace aldehydes.

Authors
Tsai-SW; Hee-SQ
Source
Appl Occup Environ Hyg 1999 Apr; 14(4):255-262
NIOSHTIC No.
20024502
Abstract
A new solid sorbent passive air sampler for aldehydes had a silicone membrane atop a cylindrical diffusion path of 1.1 cm length and 1.3 cm diameter above a 10 percent (w/w) O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine hydrochloride (PFBHA) Tenax TA pellet. Known vapor concentrations of Occupational Safety and Health Administration (OSHA)-regulated aldehydes near their permissible exposure limits were generated from a syringe pump dynamic air dilution system that was connected to an exposure chamber. The O-oxime derivatives from aldehyde reaction with PFBHA were desorbed with hexane, and quantified by capillary gas chromatography/mass spectrometry (GC/MS) or gas chromatography/electron capture detection (GC/ECD). The capacity for aldehydes with one carbonyl group was 30-35 mumoles, and 15 mumoles for the dialdehyde, glutaraldehyde. The experimental sampling rates in mL/min were 8.86 +/- 0.38, acetaldehyde; 11.69 +/- 0.32, chloroacetaldehyde; 7.85 +/- 0.19, crotonaldehyde; 9.97 +/- 0.10, formaldehyde; 6.47 +/- 0.42, furfural; and 4.46 +/- 0.15, glutaraldehyde. Other data on valeraldehyde and acrolein have shown that the sampling constants were independent of face velocity between 0.1 to 0.35 m/s (20 to 70 fpm), temperatures between 9 to 48 degrees C, RH between 3 to 79 percent, and intermittent sampling exposure pattern.
Keywords
Air-sampling; Air-sampling-techniques; Sampling-methods; Workplace-monitoring; Gas-chromatography; Aldehydes; Exposure-limits; Mass-spectrometry
CODEN
AOEHE9
CAS No.
5470-11-1; 75-07-0; 111-30-8; 107-20-0; 4170-30-3; 50-00-0; 98-01-1
Publication Date
19990401
Document Type
Journal Article
Funding Amount
515055
Funding Type
Grant
Fiscal Year
1999
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003120
Issue of Publication
4
ISSN
1047-322X
Priority Area
Research Tools and Approaches: Exposure Assessment Methods
Source Name
Applied Occupational and Environmental Hygiene
State
CA
Performing Organization
University of California Los Angeles, Los Angeles, CA
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