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首页> 外文期刊>Journal of mass spectrometry: JMS >Distinguishing authentic and counterfeit banknotes by surface chemical composition determined using electrospray laser desorption ionization mass spectrometry
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Distinguishing authentic and counterfeit banknotes by surface chemical composition determined using electrospray laser desorption ionization mass spectrometry

机译：通过使用电喷雾激光解吸电离质谱法测定的表面化学成分区分真伪钞票

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摘要

Electrospray laser desorption ionization mass spectrometry (ELDI/MS) was used to rapidly distinguish authentic banknotes from counterfeits of the US dollar and the New Taiwan dollar. The banknotes' surfaces were irradiated with a pulsed ultraviolet laser, after which the desorbed ink compounds entered an electrospray plume and formed ions via interactions with charged solvent species. Authentic banknotes were found to differ from their counterfeit equivalents in their surface chemical compositions. The detected chemical compounds included various polymers, plasticizers and inks; these results were comparable with those obtained using solvent extraction followed by electrospray ionization mass spectrometry analysis. Because of the high spatial resolution of the laser beam, ELDI/MS analysis resulted in minimal damage to the banknotes.
机译：电喷雾激光解吸电离质谱法（ELDI / MS）用于快速区分真钞和美元假钞以及新台币假钞。用脉冲紫外激光照射钞票的表面，然后解吸的油墨化合物进入电喷雾羽流，并通过与带电溶剂的相互作用而形成离子。人们发现，真实钞票的表面化学成分与假钞不同。所检测到的化合物包括各种聚合物，增塑剂和油墨。这些结果与使用溶剂萃取然后进行电喷雾电离质谱分析获得的结果相当。由于激光束的空间分辨率高，ELDI / MS分析对钞票的损害最小。

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