METHOD FOR DETERMINATION OF WEIGHT FRACTION OF FREE FAT IN MILK-BASED SOLID PRODUCTS WITH USAGE OF VACUUM DRYING Russian patent published in 2014 - IPC G01N33/04 G01N33/06 

FIELD: food industry.

SUBSTANCE: method envisages carving of a sample in the form of a plate sized (10×10×2) mm out of the product being analysed, the plate placement into a glass weighing bottle with volume equal to 10 cm³ and weight M₁, measuring the weight of the weighing bottle with the product sample M₂, the product sample drying in the weighing bottle at a residual pressure of 70-100 kPa during 8-12 hours to produce a porous capillary structure, free fat five-fold extraction (each extraction operation duration being 1 hour) with an organic solvent with the volume equal to: 1) 3 cm³, 2) 2 cm³, 3) 2 cm³, 4) 2 cm³, 5) 2 cm³, the free fat extract draining after each extraction operation into the weighing bottle with volume equal to 50 cm³ and weight M₃; the organic solvent evaporation in a water bath at a temperature of 60-80°C, measuring the weight of the weighing bottle with free fat M₄ and determination of weight fraction of free fat in the product according to the preset formula.

EFFECT: determination simplification and reliability improvement.

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