Department of Chemistry, Kyungpook National University, Daegu, 702-701, Republic of Korea.
World Institute of Kimchi, Gwangju, 61755, Republic of Korea.
J Am Soc Mass Spectrom. 2017 Aug;28(8):1687-1695. doi: 10.1007/s13361-017-1678-z. Epub 2017 May 9.
Herein we report the observation of atmospheric pressure in-source hydrogen-deuterium exchange (HDX) of thiol group for the first time. The HDX for thiol group was optimized for positive atmospheric pressure photoionization (APPI) mass spectrometry (MS). The optimized HDX-MS was applied for 31 model compounds (thiols, thiophenes, and sulfides) to demonstrate that exchanged peaks were observed only for thiols. The optimized method has been successfully applied to the isolated fractions of sulfur-rich oil samples. The exchange of one and two thiol hydrogens with deuterium was observed in the thiol fraction; no HDX was observed in the other fractions. Thus, the results presented in this study demonstrate that the HDX-MS method using APPI ionization source can be effective for speciation of sulfur compounds. This method has the potential to be used to access corrosion problems caused by thiol-containing compounds. Graphical Abstract ᅟ.
本文首次报道了大气压源内氢氘交换（HDX）巯基的观察。优化了用于正大气压光电离（APPI）质谱（MS）的巯基 HDX。优化的 HDX-MS 应用于 31 种模型化合物（硫醇、噻吩和硫化物），证明仅观察到巯基的交换峰。该优化方法已成功应用于富含硫油样品的分离馏分。在巯基馏分中观察到一个和两个巯基氢与氘的交换；在其他馏分中没有观察到 HDX。因此，本研究的结果表明，使用 APPI 电离源的 HDX-MS 方法可有效用于硫化合物的形态分析。该方法有可能用于解决含巯基化合物引起的腐蚀问题。
