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首页> 外文期刊>Journal of mass spectrometry: JMS >Mass spectrometry imaging of latent fingerprints using titanium oxide development powder as an existing matrix
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Mass spectrometry imaging of latent fingerprints using titanium oxide development powder as an existing matrix

机译：使用钛氧化钛开发粉作为现有基质的潜在指纹的质谱成像

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Recent research has focused on increasing the evidentiary value of latent fingerprints through chemical analysis. Although researchers have optimized the use of organic and metal matrices for matrix-assisted laser desorption/ionization-mass spectrometry imaging (MALDI-MSI) of latent fingerprints, the use of development powders as matrices has not been fully investigated. Carbon forensic powder (CFP), a common nonporous development technique, was shown to be an efficient one-step matrix; however, a high-resolution mass spectrometer was required in the low mass range due to carbon clusters. Titanium oxide (TiO2) is another commonly used development powder, especially for dark nonporous surfaces. Here, forensic TiO(2)powder is utilized as a single-step development and matrix technique for chemical imaging of latent fingerprints without the requirement of a high-resolution mass spectrometer. All studied compounds were successfully detected when TiO(2)was used as the matrix in positive mode, although, generally, the overall ion signals were lower than the previously studied CFP. TiO(2)provided quality mass spectrometry (MS) images of endogenous and exogenous latent fingerprint compounds. The subsequent addition of traditional matrices on top of the TiO(2)powder was ineffective for universal detection of latent fingerprint compounds. Forensic TiO(2)development powder works as an efficient single-step development and matrix technique for MALDI-MSI analysis of latent fingerprints in positive mode and does not require a high-resolution mass spectrometer for analysis.
机译：最近的研究专注于通过化学分析增加潜在指纹的证据。尽管研究人员已经优化了用于基质辅助激光解吸/电离质谱成像（MALDI-MSI）的有机和金属基质的使用潜在指纹，但尚未完全研究使用发育粉末作为基质。碳法官粉末（CFP）是一种常见的无孔发育技术，被证明是一种有效的单步基质;然而，由于碳簇，在低质量范围内需要高分辨率质谱仪。氧化钛（TiO 2）是另一种常用的发育粉末，特别是对于深色无孔表面。这里，法医TiO（2）粉末被用作单步开发和矩阵技术，用于潜在指纹的化学成像，而无需高分辨率质谱仪。当在正模式下使用TiO（2）作为基质时，成功检测到所有研究的化合物，但通常，总离子信号低于先前研究的CFP。 TiO（2）提供内源性和外源性潜在指纹化合物的质量质谱（MS）图像。随后加入TiO（2）粉末顶部的传统基质对于潜伏指纹化合物的通用检测是无效的。法医TiO（2）开发粉作为实模式下潜在指纹的MALDI-MSI分析的有效单步开发和矩阵技术，并且不需要高分辨率质谱仪进行分析。

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