Chemical changes exhibited by latent fingerprints after exposure to vacuum conditions

被引：30

作者：

Bright, Nicholas J. ^{[1
]}

Willson, Terry R. ^{[2
]}

Driscoll, Daniel J. ^{[2
]}

Reddy, Subrayal M. ^{[2
]}

Webb, Roger P. ^{[1
]}

Bleay, Stephen. ^{[3
]}

Ward, Neil I. ^{[2
]}

Kirkby, Karen J. ^{[1
]}

Bailey, Melanie J. ^{[2
]}

机构：

[1] Univ Surrey, Surrey Ion Beam Ctr, Guildford GU2 7XH, Surrey, England

[2] Univ Surrey, Guildford GU2 7XH, Surrey, England

[3] Ctr Appl Sci & Technol, Home Off, St Albans AL4 9HQ, Herts, England

来源：

FORENSIC SCIENCE INTERNATIONAL | 2013年 / 230卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

Fingerprint; SIMS; MALDI; Vacuum metal deposition; Ageing; Secondary ion mass spectrometry; ION MASS-SPECTROMETRY; GAS CHROMATOGRAPHY/MASS SPECTROMETRY; FINGERMARKS; DEPOSITION; TIME; IDENTIFICATION; SURFACES; ORDER;

D O I：

10.1016/j.forsciint.2013.03.047

中图分类号：

DF [法律]; D9 [法律]; R [医药、卫生];

学科分类号：

030101 [法学理论]; 030111 [法律史学]; 100218 [急诊医学];

摘要：

The effect of vacuum exposure on latent fingerprint chemistry has been evaluated. Fingerprints were analysed using a quartz crystal microbalance to measure changes in mass, gas chromatography mass spectrometry to measure changes in lipid composition and attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) to determine changes in the content of water, fatty acids and their esters after exposure to vacuum. The results are compared with samples aged under ambient conditions. It was found that fingerprints lose around 26% of their mass when exposed to vacuum conditions, equivalent to around 5 weeks ageing under ambient conditions. Further exposure to vacuum causes a significant reduction in the lipid composition of a fingerprint, in particular with the loss of tetradecanoic and pentadecanoic acid, that was not observed in ambient aged samples. There are therefore implications for sequence in which fingerprint development procedures (for example vacuum metal deposition) are carried out, as well as the use of vacuum based methods such as secondary ion mass spectrometry (SIMS) and matrix-assisted laser desorption ionisation (MALDI) in the study of fingerprint chemistry. (C) 2013 Published by Elsevier Ireland Ltd.

引用

页码：81 / 86

页数：6

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