Cartier J, Gueniat O, Cole M D
Institut de Police Scientifique et de Criminologie, University of Lausanne, Lausanne-Dorigny, Switzerland.
Sci Justice. 1997 Jul-Sep;37(3):175-81. doi: 10.1016/S1355-0306(97)72171-3.
Solid phase adsorption of headspace vapours was used to trap occluded solvent residues contained in 41 heroin and 54 cocaine samples, seized in Switzerland between 1994 and 1996, onto activated charcoal. The residues were eluted with carbon disulphide and analysed by GC-FID. Identification was confirmed by GC-MS. The detection limits between 2-15 ppm were determined empirically on a w/w basis for 250-300 mg powder samples. Twelve and 16 solvents were identified in the heroin and cocaine samples respectively. It was possible to relate cocaine samples to each other, but heroin comparisons proved more problematical. Trends and geographic variation in solvent use are considered and recommendations are made with respect to the control of certain solvents frequently encountered in heroin and cocaine samples.
采用顶空气体的固相吸附法，将1994年至1996年间在瑞士查获的41份海洛因和54份可卡因样品中所含的封闭溶剂残留物捕集到活性炭上。残留物用二硫化碳洗脱，并用气相色谱-火焰离子化检测器（GC-FID）进行分析。通过气相色谱-质谱联用仪（GC-MS）进行确证鉴定。针对250 - 300毫克粉末样品，通过实验确定了基于重量比在2 - 15 ppm之间的检测限。在海洛因和可卡因样品中分别鉴定出12种和16种溶剂。可以将可卡因样品相互关联起来，但海洛因样品的比较则更具问题。文中考虑了溶剂使用的趋势和地理差异，并针对海洛因和可卡因样品中经常遇到的某些溶剂的管控提出了建议。
