Systematic, generic, chemicotoxicological research in forensic toxicology. Part III. Comparison of IR and ΔIR obtained under programmed and isothermal temperature conditions

Gas-chromatog. data are presented on ∼350 drugs of forensic-toxicol. interest. These data are mainly the retention index (IR) values obtained on OV1 and OV17 columns under programmed and isothermal temp. conditions and the differences (ΔIR) obtained for the individual substances on the 2 columns. Use of the IR to express gas-chromatog. mobility gave well-reproducible data, with respect to both variations in temp. and comparison of values obtained from different labs. Taken alone, the ΔIR has low power for identifying a compd., but when used together with the IR values it constitutes a useful element for further narrowing the possibilities. The use of IR as a new approach to gas-chromatog. investigations in forensic toxicol. is suggested.