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首页> 外文期刊>Journal of forensic sciences. >Carbon‐Based Fingerprint Powder as a One‐Step Development and Matrix Application for High‐Resolution Mass Spectrometry Imaging of Latent Fingerprints
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Carbon‐Based Fingerprint Powder as a One‐Step Development and Matrix Application for High‐Resolution Mass Spectrometry Imaging of Latent Fingerprints

机译：基于碳的指纹粉作为潜在指纹高分辨率质谱成像的一步开发和矩阵应用

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Abstract Carbon‐based materials are often used as matrices for matrix‐assisted laser desorption/ionization mass spectrometry ( MALDI ‐ MS ) and its imaging ( MALDI ‐ MSI ). However, researchers have refrained from using carbon‐based fingerprint powder ( CFP ) as a matrix due to high background and contamination. In this work, the compatibility of CFP is reevaluated with MALDI ‐ MSI using a high‐resolution mass spectrometer ( HRMS ) and compared to traditional organic matrices. Relevant fingerprint compounds were easily distinguished from carbon cluster peaks when using HRMS . For fair comparison, half of a fingerprint was dusted with CFP while the other half was dusted with traditional organic matrices. All compounds studied had comparable, or higher, signal‐to‐noise (S/N) ratios when CFP was used as the matrix. Additionally, chemical image qualities closely followed the trend of S/N ratios. CFP proved to be an effective one‐step development and matrix application technique for MALDI ‐ MSI of latent fingerprints, when carbon cluster peaks are well separated by a HRMS .
机译：摘要碳基材料通常用作基质辅助激光解吸/电离质谱（MALDI - MS）及其成像（MALDI - MSI）的矩阵。然而，由于高背景和污染，研究人员已经使用碳基指纹粉末（CFP）作为基质。在这项工作中，使用高分辨率质谱仪（HRMS）并与传统的有机基质相比重新评估CFP的兼容性。使用HRMS时，可以容易地与碳簇峰区分开相关的指纹化合物。为了公平比较，指纹的一半用CFP粉尘，而另一半与传统有机基质粉碎。当CFP用作基质时，所研究的所有化合物具有可比性，或更高，信号对噪声（S / N）比率。此外，化学图像质量紧密遵循S / N比的趋势。 CFP被证明是潜在指纹的MALDI - MSI的有效的一步开发和矩阵应用技术，当碳簇峰被HRMS良好分离时。

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