NCJ Number
139764
Journal
Journal of Forensic Sciences Volume: 37 Issue: 6 Dated: (November 1992) Pages: 1550-1566
Date Published
1992
Length
17 pages
Annotation
This study extends the use of ion mobility spectrometry (IMS) to the detection and identification of amphetamine sulfate and LSD and determines the effect of innocuous materials on these drugs; an analysis time and a temperature study have determined the most suitable conditions for the simultaneous detection of four drugs of abuse.
Abstract
IMS analyzes samples in the gas phase. Because the vapor pressures of many drugs are law, the first step of the analysis consists of heating the sample to increase the amounts of vapors for eventual detection. So as to avoid condensation of the vapors in the inlet region (a glass tube that allows the vapors to pass from the desorber into the drift tube) and in the drift tube, these pathways were also kept at high temperatures. The ion mobility spectra of the four drugs of interest (cocaine, heroin, amphetamines, and LSD) were obtained at desorber temperatures of 150, 180, 210, 240, 270 and 300 degrees C, using 200 ng and 1 mg of each material at each temperature. Data presented show the average of spectra collected for 10.24 seconds and stored on a personal computer. 5 tables, 7 figures, and 16 references