METHOD OF DETERMINING CONTENT OF ACETONE-INSOLUBLE SUBSTANCES (PHOSPHOLIPIDS) IN RAPESEED LECITHIN Russian patent published in 2016 - IPC G01N24/08 

FIELD: fat and oil industry.

SUBSTANCE: invention relates to methods for analysis of quality of rapeseed lecithins and can be used in oil and fat industry. Method of determining content of acetone-insoluble substances (phospholipids) in rapeseed lecithin includes sampling of lecithin, preparation of a sample by thermal conditioning, placing sample into a sensor of pulsed NMR analyser, measurement of signal amplitudes of nuclear-magnetic proton relaxation of third (A₃) and fourth (A₄)component of lecithins in standard units and calculating content of acetone-insoluble substances (phospholipids) in lecithin. Method includes measuring signal amplitude of nuclear-magnetic proton relaxation of first (A₁) and second (A₂) component of lecithins in standard units, determining sum of amplitude (A_sis) signals of the first (A₁), second (A₂), third (A₃) and fourth (A₄) components in standard units. Method then includes calculating fraction of amplitudes of signals of third (A₃) and fourth (A₄) components in percentage as ratio of value A₃ to value A_sis, multiplied by 100, and ratio of values A₄ to value A_sis, multiplied by 100, and content of acetone-insoluble substances (phospholipids) in rapeseed lecithin (F_r) in percentage is calculated by formula F_r = 0.6992(A₃+A₄)17.09.

EFFECT: technical result is an efficient method for determination of content of acetone-insoluble substances (phospholipids) in rapeseed lecithin, ensuring high accuracy and reproducibility of determination results.

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