METHOD FOR PEROXIDE NUMBER DETERMINATION OF FAT PHASE IN STRAIGHT TYPE EMULSION FAT PRODUCT Russian patent published in 2008 - IPC G01N33/03 

FIELD: chemistry.

SUBSTANCE: method for peroxide number determination of fat phase in straight type emulsion fat product is characterized as follows: sample of straight type emulsion fat product is taken; to isolate fat phase the sample is mixed with chloroform in proportion 1:2.5 to 1:6, incubated during 30-40 min with periodic stirring at temperature 18-25°C, filtered using anhydrous sodium sulphate or calcium chloride; aliquot parts of chloroform oil extract are taken by 10-12 ml into two flasks, the first is for peroxide number determination, the second is for oil weight determination. Peroxide number is measured by direct mixing of oil chloroform extract with acetic acid and saturated potassium iodide solution followed by exposition in darkness, then water and water starch solution are added, mixed, and free iodine is titrated with sodium thiosulphate; the oil weight is determined by chloroform elimination from the second flask and drying the oil residue to constant weight, the weight value is used for peroxide number calculation. The invention allows acquiring highly accurate and technically easy method for peroxide number determination of fat phase in straight type emulsion fat product.

EFFECT: providing of accurate and technically easy method for peroxide number determination of fat phase in straight type emulsion fat product.

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