基于元素主成分分析与氧同位素比值区分不同地域来源的烟火药
Discrimination of Pyrotechnic Powders from Different Regions Based on Elements Principal Component Analysis and Oxygen Isotope Ratio
赵志东 1孟娇 2周殷玄 2张显强2
作者信息
- 1. 贵州警察学院,贵阳 550005;中国科学院广州化学研究所,广州 510650;中国科学院大学,北京 100049
- 2. 贵州警察学院,贵阳 550005
- 折叠
摘要
收集了来自11个省份实际案件中缴获的32个烟火药样品,采用电感耦合等离子体质谱法(ICP-MS)测定样品中的40种元素含量,并对具有显著性差异的元素进行主成分分析(PCA),同时使用元素分析-同位素比质谱联用仪测定氧同位素比值(δ18O值),以实现不同地域来源样品的区分.结果表明:不同地域来源样品的元素含量存在一定的特征差异,根据PCA结果可以实现大部分不同样品的区分;δ18O值的分析结果表明,不同地域来源的样品具有一定的氧同位素特征差异,部分不同地域来源样品的δ18O值发生重叠;在不同来源样品的区分中,元素含量与氧同位素比值可以相互佐证,结合二者的分析结果可以实现不同来源样品的全部区分.
Abstract
A total of 32 pyrotechnic powder samples from 11 provinces were collected.In order to discriminate of samples from different regions,40 elements in the samples were determined by inductively coupled plasma mass spectrometry(ICP-MS),and principal component analysis(PCA)was performed for elements with significant differences.Meanwhile,oxygen isotope ratio(δ18O value)was analyzed by elemental analysis-isotope ratio mass spectrometer.It was shown that the contents of elements in the samples from different regions had certain characteristics,and most different samples could be distinguished according to the analysis results of PCA.As shown by the results of δ18O value,samples from different regions had certain oxygen isotope characteristics,and the δ18O values of samples from different regions overlapped.In the distinction of samples from different regions,the content of elements and oxygen isotope ratios could corroborate each other.The both analysis results could realize the full discrimination of samples from different sources.
关键词
烟火药/地域来源/元素/氧同位素比值/区分Key words
pyrotechnic powder/region/element/oxygen isotope ratio/discrimination引用本文复制引用
基金项目
贵州省科技计划(黔科合支撑[2020]4Y059号)
公安部技术研究计划面上项目(2020JSYJB07)
国家自然科学基金(42063002)
贵州省教育厅自然科学研究项目(黔教合KY字[2021]285)
出版年
2024
NETL
NSTL
万方数据