Analysis of black writing ink by electrospray ionization mass spectrometry

被引：43

作者：

Williams, Mary R. ^{[1
]}

Moody, Chris ^{[1
]}

Arceneaux, Lei-Ann ^{[1
]}

Rinke, Caitlin ^{[1
]}

White, Katie ^{[1
]}

Sigman, Michael E. ^{[1
]}

机构：

[1] Univ Cent Florida, Natl Ctr Forens Sci, Orlando, FL 32826 USA

来源：

FORENSIC SCIENCE INTERNATIONAL | 2009年 / 191卷 / 1-3期

关键词：

Ink analysis; Electrospray; Mass spectrometry; BALLPOINT PEN INKS; FORENSIC EXAMINATION; PAPER; IDENTIFICATION;

D O I：

10.1016/j.forsciint.2009.07.003

中图分类号：

DF [法律]; D9 [法律]; R [医药、卫生];

学科分类号：

0301 ; 10 ;

摘要：

A method for the analysis of dyes and vehicles within writing inks was developed. The method was tested on a set of 18 black ink pens comprised of 6 ballpoint, 6 gel, and 6 rollerball pens. The sampling procedure utilized a small number of ink-coated paper fibers collected surreptitiously from the document, causing minimal damage and providing a sufficient quantity of ink for analysis. Methanol proved suitable for the extraction of ink components from ballpoint, gel and rollerball pens. Three separate electrospray ionisation-mass spectrometry (ESI-MS) methods were required to detect the dyes and vehicles from the inks. The ions present in the ESI-MS spectra at a signal-to-noise ratio of greater than 3:1 provided sufficient information to allow differentiation between the inks of each type. A tentative identification of the ink components was made based on a comparison of the ions present in the ink extract ESI-MIS spectra with the ions present in a series of standards. The limits of detection for the standards were generally in the 2.5-10 ppm range. The method reported here extends the ESI-MS method of ink analysis to include gel and rollerball pens, includes the analysis of vehicles as well as dyes in the inks and demonstrates a minimally destructive sampling method that does not require a "biopsy" of the document. (C) 2009 Elsevier Ireland Ltd. All rights reserved.

引用

页码：97 / 103

页数：7

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