Trace-Fiber Color Discrimination by Electrospray Ionization Mass Spectrometry: A Tool for the Analysis of Dyes Extracted from Submillimeter Nylon Fibers

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• 作者：Albert A. Tuinman ; Linda A. Lewis ; and Samuel A. Lewis ; Sr.
• 刊名：Analytical Chemistry
• 出版年：2003
• 出版时间：June 1, 2003
• 年：2003
• 卷：75
• 期：11
• 页码：2753 - 2760
• 全文大小：133K
• 年卷期：v.75,no.11(June 1, 2003)
• ISSN：1520-6882

文摘

The application of electrospray ionization mass spectrometry (ESI-MS) to trace-fiber color analysis is exploredusing acidic dyes commonly employed to color nylon-based fibers, as well as extracts from dyed nylon fibers.Qualitative information about constituent dyes and quantitative information about the relative amounts of thosedyes present on a single fiber become readily availableusing this technique. Sample requirements for establishing the color identity of different samples (i.e., comparative trace-fiber analysis) are shown to be submillimeter.Absolute verification of dye mixture identity (beyond thecomparison of molecular weights derived from ESI-MS)can be obtained by expanding the technique to includetandem mass spectrometry (ESI-MS/MS). For dyes ofunknown origin, the ESI-MS/MS analyses may offerinsights into the chemical structure of the compound-information not available from chromatographic techniques alone. This research demonstrates that ESI-MS isviable as a sensitive technique for distinguishing dyeconstituents extracted from a minute amount of trace-fiberevidence. A protocol is suggested to establish/refute theproposition that two fibers-one of which is available inminute quantity only-are of the same origin.