Preliminary evaluation of a next-generation portable gas chromatograph mass spectrometer (GC-MS) for the on-site analysis of ignitable liquid residues
Preliminary evaluation of a next-generation portable gas chromatograph mass spectrometer (GC-MS) for the on-site analysis of ignitable liquid residues
复制标题
用于现场分析可燃液体残留物的新一代便携式气相色谱质谱仪 (GC-MS) 的初步评估
DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
C. Lennard
中科院分区：
文献类型：
--
作者：
Alexander Visotin;C. Lennard
火灾现场可燃液体残留物（ILR）的检测可以是有价值的证据，以表明火灾是否可能是故意设置的。在这项研究中，一个商业上可获得的便携式GC-MS，TRIDION-9，进行了评估，现场火灾碎片分析的目的。该仪器，它采用了低热质量毛细管气相色谱仪和一个螺旋环形离子阱质谱仪，被设计为使用固相微萃取（SPME）作为默认的采样方法。四可燃液体（汽油，矿物沥青，煤油和柴油）和七个基板（尼龙，聚丙烯和羊毛地毯，橡胶和泡沫塑料，未经处理的松树和聚氨酯）被认为是。方法优化后，燃烧底物并加入0.1 μL可燃液体（矿物煤油、煤油、柴油以及纯无铅汽油和风化无铅汽油）。在3分钟内通过被动顶空SPME吸附进行采样，然后立即使用TRIDION-9进行分析（分析时间< 2分钟）。对从加速结构火灾中收集的火灾碎片样品进行了现场试验。便携式GC-MS分析的数据允许在分析的大多数样品中检测和正确分类ILR。总的来说，TRIDION-9被认为非常适合于对火灾碎片样本进行现场分析，作为初步筛选，为火灾调查人员提供快速的推定结果。
The detection of ignitable liquid residues (ILRs) at a fire scene can be valuable evidence to indicate if the fire may have been deliberately set. In this study, a commercially-available portable GC-MS, the TRIDION-9, was evaluated for the purpose of on-site fire debris analysis. The instrument, which incorporates a low thermal mass capillary GC and a miniaturised toroidal ion trap mass spectrometer, is designed to use solid-phase microextraction (SPME) as the default sampling method. Four ignitable liquids (petrol, mineral turpentine, kerosene and diesel) and seven substrates (nylon, polypropylene and wool carpet, rubber and foam underlay, untreated pine and polyurethane) were considered. After method optimisation, substrates were burned and spiked with 0.1 μL of ignitable liquid (mineral turpentine, kerosene, diesel fuel, and both neat and weathered unleaded petrol). Sampling was performed via passive headspace SPME adsorption over 3 min immediately followed by analysis using the TRIDION-9 (analysis time < 2 min). Field trials were performed on fire debris samples collected from an accelerated structural fire. The data from the portable GC-MS analyses permitted the detection and correct classification of ILRs in the majority of samples analysed. Overall, the TRIDION-9 was found to be well-suited to the field-based analysis of fire debris samples as a preliminary screen to provide rapid presumptive results for fire investigators.