FIELD: measurement technology, equipment for optical analysis of multicomponent finely divided media, in particular. SUBSTANCE: method includes illumination of sample of milk by three coherent monochromatic radiation sources with different wave lengths. Radiation scattered back is recorded by detector, its signal is converted and fractions of fat and protein in total mass are computed by empirical formulas. Sample of milk is illuminated in turn and detector is set at angle of 30-40 degrees to direction of drop of intensity of scattered back radiation I is calculated in advance. After this its value is compared with a priory set value N and, if Δ4≥N, then judgment on presence of impurities in the form of salts of heavy metals in milk is made. Concentration of impurities is found by deviation of maximum of peak of laser radiation with wave length λ1 scattered back. Fractions of fat and protein in total mass are computed by empirical formulas with use of coefficients obtained beforehand and correction for concentration of salts of heavy metals proportional to
, where
is maximum of intensity of peak of radiation scattered back in wave range λx1-λx2. EFFECT: widened application field of method thanks to possibility of simultaneous determination of concentration of salts of heavy metals, fat and protein in milk, raised efficiency of ecological control over milk products. 3 dwg, 1 tbl
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Authors
Dates
2003-01-20—Published
2000-02-03—Filed