Balsam sulfide, produced by the reaction of turpentine/rosin and sulfur, has been used as one of the raw materials of liquid gold to decorate ceramics and tableware with thin gold film for more than 100 years. The characterization of balsam sulfide is still insufficient because of its compositional complexity. In this study, balsam sulfide was characterized using pyrolysis-gas chromatography (Py-GC)-mass spectrometry (MS) and Py-GC with sulfur chemiluminescence detection (SCD) as well as matrix-assisted laser desorption/ionization time-of-flight MS (MALDI-TOFMS). Py-GC-MS/SCD analyses of balsam sulfide and its model samples revealed that the low molecular weight reaction products were mainly composed of compounds of one α-pinene unit reacted with 1-3 sulfur atoms. In the analysis of the high molecular weight components by MALDI-TOFMS, the products of two or three α-pinene units crosslinked by sulfur atoms were observed. It was found that dehydrogenation reaction proceeded gradually with the increase in the reaction time.

中文翻译：

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通过热解-气相色谱-质谱/硫化学发光检测和基质辅助激光解吸/电离飞行时间质谱表征硫化香脂。

硫化香脂是由松节油/松香和硫磺反应生成的，作为液体金的原料之一，在陶瓷和餐具上装饰金膜已有100多年的历史。由于其成分的复杂性，硫化香脂的表征仍然不足。在本研究中，使用热解气相色谱 (Py-GC)-质谱 (MS) 和 Py-GC 结合硫化学发光检测 (SCD) 以及基质辅助激光解吸/电离飞行时间对硫化香脂进行了表征MS（MALDI-TOFMS）。对硫化香脂及其模型样品的 Py-GC-MS/SCD 分析表明，低分子量反应产物主要由 1 个 α-蒎烯单元与 1-3 个硫原子反应的化合物组成。在通过MALDI-TOFMS分析高分子量组分时，观察到由硫原子交联的两个或三个α-蒎烯单元的产物。发现随着反应时间的增加，脱氢反应逐渐进行。