Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume
39, Number 2, February 2001, pp. 54-58
Characterization
of Formaldehyde By Gas Chromatography Using Multiple Pulsed-Discharge Photoionization
Detectors and a Flame Ionization Detector
J.G.
Dojahn and W.E. Wentworth
University of Houston, Department of Chemistry, Houston, TX 77024-5641
S.D. Stearns
Valco Instruments Co., Inc., P.O. Box 55603, Houston, TX 77255
Formaldehyde,
water, methanol, butanal, and butanone are characterized by gas chromatography
using three pulsed-discharge photoionization detectors (PDPIDs) and a flame
ionization detector (FID). One of the PDPIDs is operated in helium mode, and
the other two are operated in argon and krypton modes. The FID is included for
comparison. The PDPIDs are used to efficiently differentiate between and quantitatively
identify formaldehyde and the other three compounds in a sample mixture. This
is accomplished by using butanone as the internal standard and correlating the
relative responses of the four organic compounds in the helium-, argon-, and
krypton-mode PDPIDs with their relative retention times.
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