Comparative study of fatty acid and sterol profiles for the investigation of potential milk fat adulteration - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
Article Dans Une Revue Journal of Dairy Science Année : 2019

Comparative study of fatty acid and sterol profiles for the investigation of potential milk fat adulteration

Résumé

Milk fat adulteration is a common issue in Central Asia. To assess the current situation in the commercial milk market, 17 milk samples were checked for fatty acid (FA) and sterol profiles to detect potential adulteration using multivariate analysis. Analysis of FA and sterols was performed using gas chromatography with flame ionization detection and gas chromatography with mass-spectrometric detection, respectively. Cluster analysis of FA profiles revealed 3 types of milk samples: (1) samples containing a higher proportion of short-chain FA, (2) samples containing a higher proportion of long-chain FA, and (3) samples with significant amounts of C18 FA. Analysis of sterols showed that samples included (1) milk fat containing 100% cholesterol, sometimes with traces of phytosterols, (2) milk fat with high proportions of beta-sitosterol and campesterol, and (3) milk fat containing high proportions of brassicasterol. We found significant relationships between FA profiles and sterol profiles. The profiles were compared with vegetable oil patterns reported in the literature. More than 50% of the samples appeared to be counter-feited. We conclude that identification of adulteration in milk can be based solely on determination of sterol patterns.

Dates et versions

hal-02618128 , version 1 (25-05-2020)

Identifiants

Citer

Moldir Nurseitova, F. B. Amutova, A. A. Zhakupbekova, A. S. Omarova, A. B. Kondybayev, et al.. Comparative study of fatty acid and sterol profiles for the investigation of potential milk fat adulteration. Journal of Dairy Science, 2019, 102 (9), pp.7723-7733. ⟨10.3168/jds.2018-15620⟩. ⟨hal-02618128⟩
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