Journal article
Grab sampling for the determination of sulfur dioxide and dimethyl sulfide in air by isotope diluation gas chromatography/mass spectrometry
Journal of atmospheric chemistry, v 16(1), pp 23-30
1993
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Developments allowing the direct determination of sulfur dioxide and dimethyl sulfide in grab samples by gas chromatography/mass spectrometry with isotopically labeled standards (GC/MS/ILS) are reported. Isotopomers of DMS and SO2 are used as internal standards. Spiked air samples are dried to a dew point of <−60 °C and trapped cryogenically in loops of Teflon tubing. Sealed samples are transported to the laboratory under liquid nitrogen and later subjected to GC/MS analysis. Holding times of up to one month do not result in significant sample loss. For samples collected in a clean marine environment, concentrations of SO2 and DMS greater than 5 and 8 pptv, respectively, are significantly different from blanks at the 95% confidence level. Average measurement precision derived from a propagation of errors are 9% for SO2 and 42% for DMS at concentrations from 5–15 pptv.
Improvements are outlined which should provide sensitivity and precision comparable to that of on-site GC/MS. The technique will allow increased flexibility for the determination of trace sulfur species in the field under conditions where deployment of a mass spectrometer is not possible.
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Details
- Title
- Grab sampling for the determination of sulfur dioxide and dimethyl sulfide in air by isotope diluation gas chromatography/mass spectrometry
- Creators
- B. W Blomquist - Drexel UniversityA. R Bandy - Drexel UniversityD. C Thornton - Drexel UniversityS Chen - Drexel University
- Publication Details
- Journal of atmospheric chemistry, v 16(1), pp 23-30
- Publisher
- Springer
- Number of pages
- 8
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]; Chemistry
- Web of Science ID
- WOS:A1993KJ26300002
- Scopus ID
- 2-s2.0-0027341201
- Other Identifier
- 991022036295304721
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- Web of Science research areas
- Environmental Sciences
- Meteorology & Atmospheric Sciences