微束X射线荧光光谱分析技术在一种黑色纸张物证检验中的应用研究

发布时间：2019-02-15 01:48

【摘要】：对7种真假纸币样本和2003年~2008年的32宗诈骗案件中共计225件被染黑的真假纸币物证,采用微束X射线荧光光谱仪(micro-XRF)分析其二维元素分布。结果表明:纸币元素分布特征都具有特定性,相同面额相同年版的纸币元素分布特征相同,相同面额不同年版的纸币元素分布特征有差异;真假纸币元素分布特征存在显著差异;被染黑的纸币元素分布特征与原纸币相同;因而可根据被染黑真假纸币的元素分布特征,鉴定其真伪并判断纸币种类。微束XRF分析在实际案件中黑色纸张物证的检验准确率为100%。因此,微束XRF技术能有效检验被染料染黑的真假纸币,具有灵敏度高,分析过程中不破坏样品,结果准确的特点,在该类物证的检验中具有较高的应用价值。
[Abstract]:Two dimensional element distribution was analyzed by microbeam X-ray fluorescence spectrometer (micro-XRF) in the samples of 7 kinds of genuine and fake banknotes and in 32 fraud cases from 2003 to 2008. The results show that the distribution characteristics of banknote elements are all specific, the distribution characteristics of the same denomination and the same annual edition are the same, and the distribution characteristics of the same denominations are different from those of the same denominations. There are significant differences in the element distribution characteristics of genuine and fake banknotes, and the distribution characteristics of the elements of the banknotes dyed black are the same as those of the original notes, so the authenticity and the types of banknotes can be identified according to the elemental distribution characteristics of the banknotes dyed with true and false notes. Microbeam XRF analysis in the actual case of black paper physical evidence test accuracy is 100. Therefore, the microbeam XRF technique can effectively detect the true and false banknotes dyed black, with high sensitivity, no destruction of samples in the analysis process, accurate results, and has a higher application value in the examination of this kind of physical evidence.
【作者单位】：中山大学物理科学与工程技术学院物理系;广州市刑事科学技术研究所;中山大学医学院法医系;
【基金】：广州市科委科技攻关项目资助(2007Z1-E0061)
【分类号】：D918;O433.4

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