Quantification of cow milk in adulterated goat milk by HPLC-MS/MS using N-acetylglucosamine as a reliable biomarker of cow milk
文献类型： 外文期刊
作者： Li, Jing-Yan 1 ; Ge, Qian 2 ; Liu, Bin 1 ; Gao, Zhen-Peng 1 ; Guo, Chun-Feng 1 ;
作者机构： 1.Northwest A&F Univ, Coll Food Sci & Engn, Yangling 712100, Peoples R China
2.Ningxia Acad Agr & Forestry Sci, Inst Qual Stand & Testing Technol Agr Prod, Yinchuan 750002, Peoples R China
关键词： Cow milk; Goat milk; Adulteration; Biomarker; N-acetylglucosamine; HPLC-MS; MS
期刊名称：JOURNAL OF FOOD COMPOSITION AND ANALYSIS （ 影响因子：4.3； 五年影响因子：4.6 ）
ISSN： 0889-1575
年卷期： 2023 年 123 卷
页码：
收录情况： SCI
摘要： This study aimed to develop a non-protein-based method for quantify cow milk in adulterated goat milk. The raw cow milk and raw goat milk samples were mixed separately with the same volume of cold acetone and centrifuged to remove their proteins. The supernatants were evaporated, and the residues were derivatized by silylation followed by GC-MS analysis. N-acetylglucosamine was identified as a thermostable non-protein biomarker of cow milk. Its concentration in the raw cow milk (146.7 mg/L) was 32 times higher than that in the raw goat milk. On this basis, a HPLC-MS/MS method using positive-ion electrospray ionization in parallel reaction monitoring mode was developed for quantifying cow milk in adulterated goat milk by determining peak area of the biomarker. The method showed good linearity over cow milk concentrations of 1-100% and could detect as low as 0.3% cow milk in adulterated goat milk. Besides, the method was characterized by a simple sample pretreatment process, rapid detection, high accuracy, and high precision. With this method, a sample could be analyzed in 10 min. The present study demonstrated the feasibility of quantifying cow milk in adulterated goat milk using N-acetylglucosamine as a biomarker of cow milk.
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