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NCJ Number: 183390 Find in a Library
Title: Practical GC/MS Analysis of Oxidation Dye Components in Hair Fiber as a Forensic Investigative Procedure
Journal: Journal of Forensic Sciences  Volume:44  Issue:2  Dated:March 1999  Pages:292-296
Author(s): Norihiko Tanada B.S.; Seiichi Kashimura M.D.; Mitsuyoshi Kageura Ph.D.; Kenji Hara M.D.
Date Published: March 1999
Page Count: 5
Type: Report (Technical)
Format: Article
Language: English
Country: United States of America
Annotation: This article describes practical GC/MS analysis of oxidation dye components in hair fiber as a forensic investigative procedure.
Abstract: The study attempted to improve the reliability of discrimination (or identification) of dyed hair by analyzing chemical substances present in the hair, as an addition to the conventional macroscopical and microscopical examinations and ABO blood group examination. Oxidation hair-dye components were selected as the object of study. After alkaline-digestion, hair samples were adjusted to a pH of 12.6 to 12.8 and applied onto an Extrelut column. After 15 minutes, the components were simultaneously extracted and derivatized with n-hexane including 1 percent heptafluoro-n-butyryl (HFB) chloride. Their HFB derivatives within a condensed sample were diluted in ethyl acetate and analyzed by gas chromatography-mass spectrometry (GC/MS) with full mass scanning or selected ion monitoring. For estimating the levels of hair dye components, 2,4,6-trimethylaniline was used as the internal standard. Four of the components were detectable at 6 mg, one at 8 mg and one at 4 mg. Recovery percents using this procedure ranged from 54 to 86 percent. Tables, figures, references
Main Term(s): Police
Index Term(s): Chromatography; Criminalistics; Evidence identification; Forensic sciences; Hair and fiber analysis; Mass spectroscopy; Scientific techniques; Testing and measurement; Trace evidence
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