Characterization of chlorinated compounds using a dual chlorine-selective pulsed discharge emission detector-helium-pulsed discharge photoionization detector system.
The Cl-selective pulsed discharge emission detector (Cl-PDED) response is dependent only upon the Cl content, irrespective of the molecular structures of the compounds. This provides a simple, fast quantitative method of analysis for chlorinated compounds. The response of the helium-pulsed discharge photoionization detector (He-PDPID) is a function of the molecular structure and the number of photoionizable electrons using the He2 band at 13.5-17.5 eV. The ratio of the responses of the two detectors is independent of concentration and can be used to characterize the Cl-containing compounds along with the retention time, or the ratio can be used as evidence for coelution. The dual Cl-PDED-He-PDPID detector system is a useful tool for peak identification. The effect of coeluting hydrocarbons on the Cl-PDED response was evaluated by spiking a gasoline sample with US Environmental Protection Agency mixture 502. All Cl-PDED responses were greater than 90% of the response in the absence of the hydrocarbons.
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Department of Chemistry, University of Houston, TX 77204-5641, USA.
Wentworth
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Stearns
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D002713:Chlorine / Q000032:analysis*; D002849:Chromatography, Gas / Q000295:instrumentation*; D006371:Helium; D007477:Ions; D010777:Photochemistry; D012015:Reference Standards
D007477:Ions; D006371:Helium; D002713:Chlorine