These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: A new passive sampler for regulated workplace aldehydes.
    Author: Tsai SW, Hee SS.
    Journal: Appl Occup Environ Hyg; 1999 Apr; 14(4):255-62. PubMed ID: 10457648.
    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.
    [Abstract] [Full Text] [Related] [New Search]