Published:Journal of Chromatographic Science,
ISSN 0021-9665 Volume
45, Number 10, November/December 2007, pp. 671-676
A Unified Approach for the Measurement of Individual
or Total Volatile Organic Sulfur Compounds in Hydrocarbon Matrices
by Dual-Plasma Chemiluminescence Detector and Low Thermal Mass
Gas Chromatography
Ronda Gras[1], Jim Luong[1], and Randy Shearer[2]
[1]Dow Chemical Canada, PO BAG 16, Highway 15, Fort Saskatchewan,
Alberta, Canada T8L 2P4 and
[2]Rentech Inc, 12401 E. 37th Avenue,
Denver, CO 80239
A novel gas chromatographic technique has been
developed, offering dual-analytical capability of either speciation
or rapid measurement of total volatile sulfur compounds in hydrocarbon
matrices using the same hardware. The technique employs a pressurized
liquid injection system for the delivery of volatile liquid hydrocarbons,
low thermal mass gas chromatography, and a dual-plasma sulfur
chemiluminescence detector to enable this dual capability with
a high degree of sensitivity and selectivity towards sulfur-containing
compounds. Using the technique described, a detection limit in
the range of 20 ppb sulfur and less than 30 s analysis is attained.
Response is linear over five orders of magnitude, with a high
degree of repeatability.
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