High Performance Liquid Chromatography as a valuable tool for geoforensic soil analysis

被引:8
|
作者
McCulloch, G. [1 ,2 ]
Morgan, R. M. [1 ,2 ]
Bull, P. A. [3 ]
机构
[1] UCL Secur & Crime Sci, London, England
[2] UCL Ctr Forens Sci, London, England
[3] Univ Oxford, Ctr Environm, Oxford, England
基金
英国工程与自然科学研究理事会;
关键词
forensic geoscience; soil; close proximity sites; High Performance Liquid Chromatography; quartz grain surface texture analysis; Canonical Discriminant Function Analysis; FORENSIC SEDIMENT; SAMPLES;
D O I
10.1080/00450618.2016.1194474
中图分类号
DF [法律]; D9 [法律]; R [医药、卫生];
学科分类号
0301 ; 10 ;
摘要
A key issue for geoforensic analysis is the ability to discriminate between geographical locations of close proximity, often with similar underlying geology. This paper addresses the lack of empirical research into the non-mineral components of sediment samples and presents the development of a method of sediment sample characterisation by High Performance Liquid Chromatography (HPLC) utilising the organic components of the sample. A sample preparation method and set of instrument parameters were developed such that the cost of the analysis could be reduced, efficiency increased and the sample amount required for analysis reduced fourfold. The re-developed method allows samples collected from different locations within the same forensically relevant site to be accurately discriminated in this study by both visual examination of the chromatography and the use of multivariate statistics. The results of the HPLC analysis were compared with those obtained by quartz grain surface texture analysis, and HPLC was found to offer better discrimination between the samples in this instance. The results of this study suggest that HPLC has the potential to offer an accurate and practical method of comparing soil samples based on characteristics that are independent of, and therefore complementary to, traditional mineralogical-based geoforensic analyses.
引用
收藏
页码:421 / 448
页数:28
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