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Study of the cyanoacrylate fuming mechanism by matrix assister laser desorption/ionization mass spectrometry.
Journal of Mass Spectrometry : JMS 2019 January 3
Despite cyanoacrylate fuming being widely used in the forensic science field, its mechanism is not well understood. In this study, matrix assisted laser desorption/ionization (MALDI) mass spectrometry is used to study latent fingerprints that have been cyanoacrylate fumed in an attempt to gain insight into the fuming mechanism. In the negative mode mass spectrometry data, four compounds related to the polymerization of cyanoacrylate are identified and their structures are determined from accurate mass and MS/MS. A mechanism is proposed for the formation of these compounds that are regarded as intermediates in the polymerization reaction. In addition, based on the fuming of standard endogenous compounds, we suggest fatty acids and amino acids are the major catalytic nucleophiles that initiate the polymerization reactions.
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