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pubmed-article:2592310pubmed:abstractTextA new method for the determination of trace levels of formaldehyde in air was developed and validated. The method is based on the reaction of formaldehyde with cysteamine to form thiazolidine. Air samples containing trace levels of formaldehyde were prepared from paraformaldehyde. The percent yield of formaldehyde from paraformaldehyde was 85.1 +/- 1.14%. Air samples were bubbled into an aqueous cysteamine trap. Thiazolidine formed from formaldehyde and cysteamine in the trap was determined by gas chromatography with a fused silica capillary column and a nitrogen-phosphorus detector (NPD). The lowest detection level for thiazolidine was 17.2 pg, equivalent to 5.80 pg formaldehyde. The recovery efficiency of trace gas phase formaldehyde in air was greater than 90%. Formaldehyde levels in ambient laboratory air were 48.9-56.2 ppb (v/v).lld:pubmed
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pubmed-article:2592310pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:2592310pubmed:articleTitleFormaldehyde quantitation in air samples by thiazolidine derivatization: factors affecting analysis.lld:pubmed
pubmed-article:2592310pubmed:affiliationUniversity of California, Department of Environmental Toxicology, Davis 95616.lld:pubmed
pubmed-article:2592310pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:2592310pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed