Impact of freeze-drying and subsequent storage on milk metabolites based on H-1 NMR and UHPLC-QToF/MS

文献类型： 外文期刊

第一作者： Zhu, Dan

作者： Zhu, Dan;McComb, Kiri;Frew, Russell;Zhu, Dan;Chen, Gang;Kebede, Biniam

作者机构：

关键词： Raw milk; Freeze-drying; Storage stability; Untargeted metabolomics; Multivariate data analysis; Marker metabolites

期刊名称：FOOD CONTROL （ 影响因子：5.548； 五年影响因子：5.498 ）

ISSN： 0956-7135

年卷期： 2020 年 116 卷

页码：

收录情况： SCI

摘要： This study is the first to investigate the effect of freeze-drying on raw milk metabolites using untargeted metabolomics. To detect as many metabolites as possible in the liquid fractions, a multiplatform metabolomics approach was implemented using both NMR and MS-based techniques. The chemical fingerprint of freeze-dried milk powder was monitored during storage at three temperatures (room temperature, 4 degrees C, -20 degrees C) for up to 224 days. This study demonstrated that freeze-drying was an efficient means of drying milk resulting in only minor changes to the metabolites. With respect to storage, freeze-dried milk powders stored at 4 degrees C and -20 degrees C exhibited a stable metabolome while samples stored at 20 degrees C resulted in a clear change. During ambient storage, the concentrations of orotic acid, riboflavin and acetyl-carbohydrate reduced while those of fatty acids, threonic acid and uridine increased. The results from this study provide the foundation for experiment design and marker selection for further studies on milk metabolomics.

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