Procedures of individual raw milk sampling and their influence on physico-chemical composition and somatic cell count

To increase industrial production, improve quality and meet consumers’ demand, dairy industry has become more demanding regarding raw material suppliers. It is assumed that both milking type and raw milk sampling influence the physico-chemical composition and somatic cell count (SCC). To confirm this hypothesis, 180 samples from 30 cows were analysed. A factorial arrangement 2x3 was used, being two sampling types (manual - collecting the first 100mL, and milking machine - samples from the complete milking) and three types of samples (morning, afternoon and pool). The fat and TS (Total Solids) contents were most influenced either by the type of collection or the the type of sampling. Variation between the protein and lactose contents was observed according to the types of sampling. Statistical differences (P<0.05) were verified for SNF (Solids Non Fat) values according to the milking type. The SCC values showed low correlations to the contents of fat, milk and TS and negative correlations to the lactose and SNF contents. The results showed the influence of the milking type on the physical chemical composition and milk SCC and the importance of standardizing the milk sampling technique.

milking; raw milk sampling; physico-chemical composition; somatic cell count