File(s) under permanent embargo
Temperature-programmable resistively heated micromachined gas chromatography and differential mobility spectrometry detection for the determination of non-sulfur odorants in natural gas
journal contribution
posted on 2013-03-19, 00:00 authored by J Luong, R Gras, H J Cortes, Robert ShellieRobert ShellieA portable, fast gas chromatographic method for the direct measurement of the parts per billion level of sulfur-free odorants in commercially available natural gas is introduced. The approach incorporates a resistively heated, temperature-programmable silicon micromachined gas chromatograph that employs a standard capillary column for the fast separation of methyl and ethyl acrylate from the natural gas matrix. The separation approach is coupled to a micromachined differential mobility detector to enhance analyte detectability, and the overall selectivity obtained against the matrix is described. A complete analysis can be conducted in less than 70 s. Furthermore, these two compounds can be measured accurately in the presence of other common volatile sulfur-based odorants such as alkyl mercaptans and alkyl sulfides. Repeatability of less than 3% RSD (n = 20) over a range from 0.5 to 5 ppm was obtained with a limit of detection for the target compounds at 50 ppb (v/v) and a linear range from 0.5 to 50 ppm with a correlation coefficient of at least 0.997. © 2013 American Chemical Society.
History
Journal
Analytical ChemistryVolume
85Issue
6Pagination
3369 - 3373Publisher
ACS PublicationsLocation
Washington, D.C.Publisher DOI
ISSN
0003-2700eISSN
1520-6882Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2013, American Chemical SocietyUsage metrics
Categories
No categories selectedLicence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC