ISSN: 0022-1198
CODEN: JFSCA
Page Count: 9

The Use of HPLC with Multiwavelength Detection for the Differentiation of Non Ball Pen Inks
Chen, C
Assistant professor and graduate assistant, University of Illinois at Chicago, IL

Tebbett, IR
Assistant professor and graduate assistant, University of Illinois at Chicago, IL

Olson, L
Forensic scientists, IRS Forensic Laboratory, IL

Fitzgerald, M
Forensic scientists, IRS Forensic Laboratory, IL

(Received 27 July 1991; accepted 18 November 1991)

Abstract

High performance liquid chromatographic (HPLC) systems were developed for the examination of blue non ball pen inks. Using an isocratic chromatographic system, together with a Spectra Physics multiwavelength detection system, over 100 blue non ball pen inks were distinguished. The majority of these had not previously been separated by traditional methods. This approach offers a number of advantages over thin layer chromatography. Sensitivity is greatly improved, allowing the detection of picograms of sample, and the increased resolution results in far more information being produced, allowing a more meaningful comparison of samples.

Keywords:
questioned documents, ink analysis, HPLC, multiwavelength detection

Paper ID: JFS13300J
DOI: 10.1520/JFS13300J
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