Table 2 - uploaded by Manuja Lamabadusuriya
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Summary of IMS data for chemical warfare agent simulants, toxic industrial chemicals indicating the maximum peak shifts for different modifiers
Source publication
The overall objective of this project was to develop an analytical method that utilizes structure selective ion molecule interactions (SSIMI) in ion mobility spectrometry (IMS) to shift the mobility of a targeted analyte through the addition of a gas phase modifier to the buffer gas. IMS is a sensitive, rapid method for the detection of harmful che...
Contexts in source publication
Context 1
... L is the ion drift distance in centimeters, V is the voltage drop across L, and t d is the time is takes the ion to traverse L . The earliest work showing a change in the ion mobility related to the composition of the drift gas was done by measuring the mobility of K + in various percent composi- tion mixtures of He, Ne, Ar, H 2 and N 2 drift gases [11]. In 2007, gas phase mobilities of response ions for selected drugs and explosives were measured in four different drift gases, air, nitrogen, carbon dioxide and nitrous oxide [7]. When ion mobility was plotted against drift gas polarizability, the resulting slopes were unique for individual ions, indicating ...
Context 2
... gas modifiers that were tested included 4-methyl-2-pentanone, 2-butanol, acetoni- trile, triethylamine, aniline, nitromethane, 2-ethylhexyl sa- licylate, ethyl-L-lactate, propanenitrile, acrylonitrile, and isovaleronitrile. Table 2 is a summary of the changes in drift times that occurred as a function of modifier addition. The largest shifts for the DMMP monomer ion were with 4-methyl-2-pentanone and ethyl lactate where the ratio of the reduced mobility with modifier (K o (M)) to the reduced mobility without modifier (K o ) were 0.749 and 0.747, respectively, indicating that a ketone functional group had a larger interaction with the DMMP monomer ion. ...
