METHOD OF DETERMINATION OF EARLY DAMAGE OF DAIRY AND FERMENTED MILK PRODUCTS Russian patent published in 2009 - IPC G01N33/04 

FIELD: physics, measuring.

SUBSTANCE: invention concerns analytical chemistry of foodstuff and can be used for an establishment of early damage of dairy and sour-milk yields. According to the method the test prepared for the analysis place in a weighing bottle with a polyurethane membrane on a cover, maintain 10 minutes, then use a syringe to extract 1 cm³ of an equilibrium gas phase, which inject in the case of the static "piezoelectronic nose". Last consists from 2 piezoquartz resonators with the electrodes are modified by drawing on their surface of a film of polar chromotographic sorbents in mass of 15 mkg. Further fix an oscillation frequency of piezoquartz resonators with films with an interval 5 seconds during 15 seconds and shape the net signal in the form of the kinetic "weight aromogram" and count its area. Bacterial damage of the product is determined on acidity, using the diagramme of dependence of the "weight aromogram" area from acidity.

EFFECT: provision of accuracy, simplicity and rapidity of determination.

2 dwg, 1 tbl, 1 ex