What is designation?
The test consists in hydrating the product with 0.3 ml of the hydrating reagent, applying a sample of the tested milk in the amount of 0.1 ml, incubating for 3h ± 15min for POLUTEST M or 3h 15min ± 15min for POLUTEST MS at 640C in a heating block, at 650C in a water bath, or at 670C in a thermostat and reading the results on the basis of the indicator colour change caused by the growth of the test strain (Bacillus stearothermophilus var. calidolactis). The result is determined based on the colour of the gel. A blue-violet colour indicates the presence of inhibitory substances in the milk, while a yellow colour indicates their absence.