Differentiation of Laser Printer Toners by μ-XRF

Abstract

Abstract: Objective To develop a μ-energy-dispersive X-ray fluorescence spectrometry ( μ-XRF ) for differentiation of laser printer toners on questioned documents. Methods Nine toner samples, corresponding printed samples and lifted toner samples were investigated by μ-XRF with spot size of approximate 100 μm. Results Nine toner samples, corresponding printed samples and lifted toner samples were classified into 7, 4 and 4 groups and the discriminating power is 94.4%、75%、69.4%. Conclusion The μ-XRF technique offers an effective method and allows examiners to perform a non-destructive analysis of toners on documents.

Key words: questioned document, laser printer toner, μ-XRF

摘要： 目的利用微束X射线荧光分析法(μ-XRF)研究激光打印机用墨粉的鉴别。方法利用μ-XRF对9台不同型号激光打印机用墨粉、对应的打印字迹、提取的字迹墨粉所含元素进行定性、半定量的分析。结果根据检出元素种类的不同,可将9台不同型号激光打印机用墨粉、对应的打印字迹、提取的字迹墨粉分成7类、4类、4类,区分率分别为94.4%、75%、69.4%。结论本研究所建立的μ-XRF鉴别激光打印机墨粉方法具有微区、原位无损检验等优点,对提高激光打印文件检验水平具有现实意义。

关键词: 可疑文件, 激光打印墨粉, 微束X射线荧光分析法

XU Che;LUO Yi-wen;YANG Xu;SHI Shao-pei;XI Jian-hua (Institute of Forensic Sciences;Ministry of Justice;Shanghai 00;China). Differentiation of Laser Printer Toners by μ-XRF[J]. , 2008(02): 21-24.

徐彻;罗仪文;杨旭;施少培;奚建华;. 微束X射线荧光分析法鉴别激光打印机墨粉的研究[J]. , 2008(02): 21-24.

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Differentiation of Laser Printer Toners by μ-XRF

微束X射线荧光分析法鉴别激光打印机墨粉的研究

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