刑事技术2016，Vol.41Issue(6)：470-475,6.DOI:10.16467/j.1008-3650.2016.06.010
电感耦合等离子体质谱在微量物证检验中的应用
The Application of Inductively Coupled Plasma Mass Spectrometry in Trace Evidence Examination
摘要
Abstract
ABSTRACT:Elemental analysis is important for forensic chemists to examine trace evidence. The analysis of both major and trace element is widely used for forensic comparisons, having successfully provided essential information for evidence provenancing. Although there are several established techniques available to determine elemental composition, the inductively coupled plasma mass spectrometry (ICP-MS) has in the latest decade drawn much more attention from many scientists, including those who are concerned with forensic applications. Compared with other elemental analytic methods, e.g., X-ray lfuorescence (XRF), atomic absorption spectrophotometry (AAS), neutron activation analysis (NAA) and energy (or wavelength) dispersive X-ray microanalysis (EDS or WDS), ICP-MS has many advantages, for example, the capability of more suitable to simultaneously measure the abundance of a large suite of elements in small samples;time and resource saving when coupled with laser ablation approach because of its non-necessity of sample preparation, proximity to non-destruction on the sample, avoidance of demand to measure on smooth surfaces required by XRF;and quantitative analysis of major, minor and trace elements in one analytic run. All these advantages help to examine trace evidence more easily and quickly. In our laboratory, ICP-MS has been used to measure the heavy metal (Hg, Ti, Cr, As) contents in human tissues related to poisoning events, the liquids discharged into river or soil to tell if they are harmful to the environment. Moreover, the laboratory also used ICP-MS, combined with the laser ablation approach, to examine the amount-small soil evidence, counterfeit banknote paper and thin metal wires to make them compared and identiifed. In addition, lead isotope ratio among bullet alloys has been detected to differentiate them and link them with their manufacturers. At present, our on-going application of ICP-MS is under development in aspects such as the elemental mapping of geological evidence and the strata analysis into vehicle paints.关键词
电感耦合等离子体质谱/激光蚀刻电感耦合等离子体质谱/微量物证/元素分析/同位素比值Key words
ICP-MS/LA-ICP-MS/trace evidence/elemental analysis/isotope ratio分类
社会科学引用本文复制引用
郭洪玲,乔婷,宋小娇,韩星星,高婷,权养科,朱军..电感耦合等离子体质谱在微量物证检验中的应用[J].刑事技术,2016,41(6):470-475,6.基金项目
FundProject of Technical Research Granted from Ministry of Public Security (No.2015JSYJC48) （No.2015JSYJC48）
