Tuesday, October 24, 2017

A Portable GC/PID for the Analysis of Odorous Sulfur Compounds in Ambient Air











Methodology:
Feb 26 - Mar 1, 2018
Orange County Convention Center
Orlando, FL, USA

Accepted for presentation at #Pittcon 2018 in the American Chemical Society Division of Analytical Chemistry Poster Session

Sunday evening February 25, 2018 Valencia Ballroom D, W415, of the Orange County Convention Center, 5:30pm-7:30pm

Gas Chromatography
Application:Environmental
Primary Focus:Application
Title:A Portable GC/PID for the Analysis of Odorous Sulfur Compounds in Ambient Air
Keywords:
Air
GC
Industrial Hygiene
Portable Instruments
 

A capillary column gas chromatography method was used for the analysis of sulfur compounds such as hydrogen sulfide, methyl mercaptan, dimethyl sulfide, and dimethyl disulfide in ambient air. The concentration of these sulfur compounds is typically very low (low to sub ppb) in ambient air. Their odor threshold is at the low ppb levels so it is also necessary to make field measurements near odorous sulfur sources such as refineries, pulp and paper mills, etc. because of the high reactivity of the sulfur compounds. A portable gas chromatograph (GC) with a photoionization detector (PID) and concentrator is ideal for this application because of the high sensitivity of the PID to sulfur


compounds and it does not need support gases such as zero air or hydrogen. It has more than 100 times the sensitivity of the flame photometric detector and a much wider dynamic range.