Federal Bureau of Investigation Laboratory, Quantico, VA 22135, USA.
J Anal Toxicol. 2012 Mar;36(2):112-5. doi: 10.1093/jat/bks002.
In cases of death by inert gas asphyxiation, it can be difficult to obtain toxicological evidence supporting assignment of a cause of death. Because of its low mass and high diffusivity, and its common use as a carrier gas, helium presents a particular challenge in this respect. We describe a rapid and simple gas chromatography-thermal conductivity detection method to qualitatively screen a variety of postmortem biological specimens for the presence of helium. Application of this method is demonstrated with three case examples, encompassing an array of different biological matrices.
在因惰性气体窒息而死亡的情况下，很难获得支持死因鉴定的毒理学证据。由于氦气的质量低、扩散性高，且常被用作载气，因此在这方面带来了特殊的挑战。我们描述了一种快速而简单的气相色谱-热导检测方法，用于定性筛选各种死后生物标本中氦气的存在。该方法的应用通过三个案例得到了证明，涵盖了一系列不同的生物基质。
