Maillard reaction products and guaiacol as production process and raw material markers for the authentication of sesame oil
Maillard reaction products and guaiacol as production process and raw material markers for the authentication of sesame oil
复制标题
美拉德反应产物和愈创木酚作为芝麻油认证的生产工艺和原料标记
DOI：
10.1002/jsfa.11353
复制
发表时间：
2021-06-22
影响因子：
4.1
通讯作者：
Fu, Haiyan
中科院分区：
文献类型：
--
作者：
Liu, Rui;Chen, Hengye;Fu, Haiyan
背景技术芝麻油具有优良的风味，深受人们的喜爱。由于其原料价格较高，其价格比其他植物油要高，而且加工工艺不同，产品质量等级不同，价格也不同。市场上，受经济利益驱动，芝麻油掺假问题长期存在。因此，用于区分芝麻油原料和生产工艺真伪的挥发性标记物的筛选非常重要。结果本工作通过气相色谱-串联质谱（GC-MS/MS）结合化学计量学分析，筛选出与芝麻油生产工艺和原料相关的6个标记物。它们是3-甲基-2-丁酮、2-乙基-5-甲基-吡嗪、愈创木酚、2,6-二甲基-吡嗪、5-甲基糠醛和乙基-吡嗪。芝麻油中这些标记物的浓度是其他植物油中的 10 至 1000 倍。然而，由于采用不同的生产工艺，只有3-甲基-2-丁酮和2-乙基-5-甲基-吡嗪存在显着差异。除愈创木酚主要来源于原料外，上述其他五种化合物均由热处理过程中的美拉德反应产生。上述6种化合物足以辨别芝麻油原料和生产工艺造假，并能准确识别30%浓度的掺假水平。结论本研究中的分类标记能够准确识别芝麻油的掺假情况。因此，这六种化合物对于芝麻油的真伪具有重要意义，为快速准确鉴别芝麻油的真伪提供了理论依据。 (c) 2021 年化学工业学会。
BACKGROUND Sesame oil has an excellent flavor and is widely appreciated. It has a higher price than other vegetable oils because of the high price of its raw materials, and different processing techniques also result in products of different quality levels, which can command different prices. In the market, there is a persistent problem of adulteration of sesame oil, driven by economic interests. The screening of volatile markers used to distinguish the authenticity of sesame oil raw materials and production processes is therefore very important. RESULTS In this work, six markers related to the production processes and raw materials of sesame oil were screened by gas chromatography-tandem mass spectrometry (GC-MS/MS) combined with chemometric analysis. They were 3-methyl-2-butanone, 2-ethyl-5-methyl-pyrazine, guaiacol, 2,6-dimethyl-pyrazine, 5-methyl furfural, and ethyl-pyrazine. The concentration of these markers in sesame oil is between 10 and1000 times that found in other vegetable oils. However, only 3-methyl-2-butanone and 2-ethyl-5-methyl-pyrazine differed significantly as the result of the use of different production processes. Except for guaiacol, which was mainly derived from raw materials, the other five compounds mentioned above all result from the Maillard reaction during thermal processing. The six compounds mentioned above are sufficient to distinguish fraud involving sesame oil raw materials and production processes, and can identify accurately adulteration levels of 30% concentration. CONCLUSION In this study, the classification markers can identify the adulteration of sesame oil accurately. These six compounds are therefore important for the authenticity of sesame oil and provide a theoretical basis for the rapid and accurate identification of the authenticity of sesame oil. (c) 2021 Society of Chemical Industry.