Croxton Ruth S, Baron Mark G, Butler David, Kent Terry, Sears Vaughn G
Department of Forensic and Biomedical Sciences, University of Lincoln, Brayford Pool, Lincoln, LN6 7TS, UK.
J Forensic Sci. 2006 Nov;51(6):1329-33. doi: 10.1111/j.1556-4029.2006.00203.x.
Latent fingerprint residue is a complex mixture of organic and inorganic compounds. A full understanding of the composition of this mixture and how it changes after deposition is lacking. Three solvent systems were compared for the simultaneous extraction and derivatization with ethyl chloroformate of selected amino and fatty acids from a nonporous substrate (Mylar for subsequent analysis by gas chromatography-mass spectrometry. A solvent system comprised of sodium hydroxide, ethanol, and pyridine was found to be the most effective. This method was applied to the analysis of latent fingerprint residue deposited on Mylar and preliminary data are presented. Twelve amino acids (e.g., serine, glycine, and aspartic acid) and 10 fatty acids (e.g., tetradecanoic, hexadecanoic, and octadecanoic acids) were identified. The potential application of this method to further the understanding of latent fingerprint chemistry has been demonstrated.
潜在指纹残留物是有机和无机化合物的复杂混合物。目前尚缺乏对该混合物成分及其沉积后变化情况的全面了解。比较了三种溶剂体系，用于从无孔基质（聚酯薄膜）中同时提取选定的氨基酸和脂肪酸并用氯甲酸乙酯进行衍生化，以便随后通过气相色谱 - 质谱联用仪进行分析。发现由氢氧化钠、乙醇和吡啶组成的溶剂体系最为有效。该方法应用于分析沉积在聚酯薄膜上的潜在指纹残留物，并给出了初步数据。鉴定出了12种氨基酸（如丝氨酸、甘氨酸和天冬氨酸）和10种脂肪酸（如十四烷酸、十六烷酸和十八烷酸）。已证明该方法在进一步了解潜在指纹化学方面的潜在应用。
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