基于UPLC-ESI-QTOF-MS/MS技术检测龟甲胶中新阿胶成分

目的：检测龟甲胶中新阿胶特征肽成分。方法：采用胰蛋白酶进行酶解，利用超高效液相色谱-电喷雾四极杆飞行时间质谱法（UPLC-ESI-QTOF-MS/MS）对龟甲胶样品进行测定，选定新阿胶特征肽离子m/z 925.4作为检测离子。结果：龟甲胶特征成分含量偏低的样品（但不含有牛皮元和驴皮元特征肽成分）中检测出新阿胶特征肽离子m/z 925.4信号，其MS/MS裂解规律与文献报道一致，而龟甲胶标准品中未检测出该特征肽信号。结论：该方法专属性强、灵敏度高，可检测出龟甲胶中是否掺杂新阿胶成分，可用于龟甲胶的质量控制。

Identification of Pig-Hide Gelatin from Tortoise-Shell Glue by UPLC-ESI-QTOF-MS/MS

This study aimed at identifying pig- hide gelatin from tortoise shell glue using ultra- performance liquid chromatography-electrospray-time of flight mass spectrometry(UPLC-ESI-QTOF-MS/MS).The samples of tortoise shell glue were digested by trypsin before the analysis on UPLC coupled with QTOF mass spectrometry.The ions at m/z 925.4 were selected as the marker peptides of pig-hide gelatin.It was found that the test results of the ions at m/z 925.4 were positive in the samples with low contents of the marker peptides of tortoise shell glue,indicating the existence of pig-hide gelatin.However,the result of bovine- hide gelatinordonkey- hide gelatin was negative,while negative results were detected in tortoiseglue standard.The finding was in conformity with previous references over the fragmentation regularity of MS/MS.In conclusion,the method can be adopted to identifying the pig-hide gelatin from tortoise shell glue and applied to the quality control of tortoise shell glue with high specificity and sensibility.