基于微量元素与氮氧同位素比值的黑火药来源区分  

Discrimination of black powder from different regions based on trace elements and the ratio of nitrogen and oxygen isotopes

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作  者:赵志东 孟娇 周殷玄 张显强 ZHAO Zhi-dong;MENG Jiao;ZHOU Yin-xuan;ZHANG Xian-qiang(Guizhou Police College,Guiyang 550005,China;Guangzhou Institute of Chemistry,Chinese Academic of Science,Guangzhou 510650,China;University of Chinese Academic of Science,Beijing 100049,China)

机构地区:[1]贵州警察学院,贵州贵阳550005 [2]中科院广州化学所,广东广州510650 [3]中国科学院大学,北京100049

出  处:《化学研究与应用》2023年第6期1454-1458,共5页Chemical Research and Application

基  金:贵州省科技计划项目(黔科合支撑[2020]4Y059号)资助;公安部技术研究计划面上项目(2020JSYJB07)资助;国家自然科学基金资助项目(42063002)资助;贵州警察学院校级课题(2022XJQN06)资助。

摘  要:收集了来自6个省份真实案件中的29个黑火药样品,对样品中微量元素和氮氧同位素进行分析,以实现不同地域来源样品的区分。选取40种元素中的10种存在显著性地域差异的元素进行主成分分析(Principle component analysis,PCA)。结果表明,不同来源样品的微量元素存在一定的特征差异,根据PCA的统计结果可以将样品分为六类,部分样品之间能够实现区分;氮氧同位素的分析结果表明,不同来源的样品具有显著的同位素特征,根据同位素分析结果能够实现绝大部分样品的区分;结合元素分析和氮氧同位素分析结果,能够实现不同黑火药样品的区分或建立不同样品之间的联系。Twenty-nine black powder samples from real cases in 6 provinces were collected,and trace elements and nitrogen and oxygen isotopes in the samples were analyzed to distinguish different samples.Ten of the 40 elements with significant regional differences were selected for principal component analysis(principle PCA).The results showed that the trace elements of samples from different sources have certain characteristics.According to the analysis results of PCA,the samples can be divided into six categories,some samples can be distinguished;the analysis results of nitrogen and oxygen isotopes show that samples from different sources have significant isotopic characteristics,and most samples can be distinguished according to the isotope analysis results;combined with the results of elemental analysis and nitrogen and oxygen isotope analysis,the distinguish between different samples can be made and the connection between different samples can be established.

关 键 词:微量元素 氮氧同位素 黑火药 区分 来源推断 

分 类 号:O657.99[理学—分析化学]

 

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