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作为土壤法医分类的工具,X射线粉碎衍射和监督自组织地图作为土壤法医分类的工具

Hirijete Idrizi¹, Mile Markoski², Metodija Najdoski³

¹State University of Tetovo, Faculty of Natural Sciences and Mathematics, Bul. Ilinden bb, Tetovo 1200, North Macedonia. hirijete.idrizi@unite.edu.mk.

Acta chimica Slovenica

|December 21, 2023

概括

使用X射线粉末衍射和自组织地图进行土壤分析,可以准确地识别土壤样本作为法医证据. 这种方法显示了高分类性能,即使有季节性变化.

科学领域:

法医科学法医科学法医科学
地质化学地质化学
材料科学材料科学材料科学

背景情况:

土壤在刑事调查中经常被用作痕迹证据,因为土壤具有固有的可转移性.
对于法医科学来说,有效的土壤分析方法对于将嫌疑人与犯罪现场联系起来至关重要.

研究的目的:

开发和评估使用X射线粉末衍射 (XRPD) 和监督自组织图 (SOM) 的土壤样本分类模型.
评估这些模型与天气和季节性变化等环境因素的稳定性.

主要方法:

分析了来自北马其顿Tetovo的城市和农村地区的172个土壤样本,使用X射线粉末衍射.
基于获得的衍光图,开发使用监督自组织地图的分类模型.
在独立的测试组中验证模型性能,并在三年后对28个样本进行重新分析.

主要成果:

开发的分类模型实现了高准确度,正确分类了独立测试组中的95.6%至97.8%的样本.
模型在分类土壤样本方面表现出有效性,即使在三年后,在28个附加样本中,有27个样本被正确识别.

结论:

监督自组织地图与X射线粉末衍射相结合,为基于土壤的法医分析提供了可靠和准确的方法.
开发的模型显示了对环境变化的弹性,提高了它们在现实世界法医调查中的实际适用性.

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