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

FIELD: fat and oil industry.

SUBSTANCE: invention relates to methods of analysis of quality of sunflower lecithins and can be used in oil and fat industry. Method of determining content of acetone non-soluble substances (phospholipids) in sunflower lecithin includes sampling of lecithin, preparation of sample by thermal conditioning, placing sample into sensor for pulsed NMR analyser, measurement of signal amplitudes of nuclear-magnetic proton relaxation of third (A₃) and fourth (A₄) component lecithins in standard units and calculating content of acetone non-soluble substances (phospholipids) in lecithin. At that, nuclear-magnetic proton relaxation of first (A₁) and second (A₂) component lecithins signals amplitude is measured in standard units. Then amount of amplitude (A_SYS.) signals of first (A₁), second (A₂), third (A₃) and fourth (A₄) components in standard units. Then fraction of amplitudes of signals of third (A₃) and fourth (A₄) components in percentage as ratio of values of A₃ to value of A_SYS, multiplied by 100, and ratio of values of A₄ to the value of A_SYS., multiplied by 100, and content of acetone non-soluble substances (phospholipids) in sunflower lecithin (F_p.) in percentage is calculated by formula: F_p.=0.8484(A₃+A₄)+7.35.

EFFECT: high accuracy and reproducibility of results of determining content of acetone non-soluble substances (phospholipids) in sunflower lecithin.

1 cl, 2 ex