Characterization of lipid composition and physicochemical properties of clarified yak milk fat

Measurement: Food Pub Date : 2024-08-02 DOI:10.1016/j.meafoo.2024.100189

Tarun Pal Singh , Gaurav Kr Deshwal , Sanket G. Borad , Joken Bam , Vijay Paul

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Abstract

In the present study, the samples of clarified milk fat (CMF) of yak species (Arunachali yak and yak-cow hybrid) were collected and analysed for physicochemical parameters, colour values, fatty acid composition and triglyceride profile, and FT-IR characteristics. The obtained results showed that CMF contains a variable amount of moisture (0.25 %–20.28 %), free fatty acid (0.12–2.03 % oleic acid), peroxide values (0.30–1.20 meq.O₂/kg fat), Reichert Meissl value (19.06–23.54) and Butyro-Refractrometer reading (43.03–44.47). The colour value (L*, a*, b*) varied with altitude level and region significantly (p < 0.05). The regional variations in triglycerides and fatty acid profile of CMF were also found significantly (p < 0.05). The preliminary data of FT-IR spectra of all samples showed almost similar functional groups but slight difference in the absorbance as well as peaks in the finger print region.

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澄清牦牛乳脂肪的脂质成分和理化特性的表征

本研究收集了牦牛（阿鲁纳恰里牦牛和牦牛-牛杂交种）的澄清乳脂（CMF）样品，并对其理化参数、色值、脂肪酸组成和甘油三酯概况以及傅立叶变换红外光谱特性进行了分析。结果表明，CMF 含有不同数量的水分（0.25 %-20.28 %）、游离脂肪酸（0.12-2.03 % 油酸）、过氧化值（0.30-1.20 meq.O2/kg 脂肪）、Reichert Meissl 值（19.06-23.54）和 Butyro 折射仪读数（43.03-44.47）。色值（L*、a*、b*）随海拔高度和地区的不同而有显著差异（p < 0.05）。中药材中甘油三酯和脂肪酸含量的地区差异也很明显（p < 0.05）。所有样品的傅立叶变换红外光谱的初步数据显示，其官能团几乎相似，但吸光度和指纹区的峰值略有不同。

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来源期刊

Measurement: Food

CiteScore

3.10

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0.00%

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