Published:Journal of Chromatographic Science,
ISSN 0021-9665 Volume
46, Number 8, September 2008, pp. 665-670
The Determination of Tertiary Dodecyl Mercaptan
by Low Thermal Mass Gas Chromatography–Dual Plasma Sulfur
Chemiluminescence Detection
Ronda Gras1, Jim Luong1,
Patric Eckerle2,
and Randy Shearer3 1Dow Chemical Canada, PO BAG 16, Highway 15, Fort Saskatchewan,
Alberta, Canada T8L 2P4; 2Dow Chemical Germany, Werk Rheinmuenster,
Industriestrasse 1, Dow Deutschland GMBH & Co., Germany;
3Rentech Inc, 12401 E. 37th Avenue, Denver, CO 80239
Tertiary dodecyl mercaptan (TDM) is commonly used
as a chain transfer agent in the manufacturing process of styrene/butadiene
latex for use in carpet and paper industries. A gas chromatographic
technique has been successfully developed for the measurement
of TDM based on its sulfur content for material identification,
trend analysis, or for the monitoring of un-reacted residual
material in final products. The method employs low thermal mass
gas chromatography (LTM-GC) and a dual-plasma sulfur chemiluminescence
detector (DP-SCD) to attain a high degree of sensitivity and
selectivity. Using the technique described, a detection limit
in the range of 0.5 ppm (v/v) TDM and less than 1 min analysis
time can be achieved. Response is linear over four orders of
magnitude with high degree of repeatability of less than 5% RSD.
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