Coefficient of Variation for Somatic cell counter

Coefficient of variation (CV) %:

Coefficient of variation (CV) % is measured in Reference mode following the instruction for Reference testing procedure. It is determined by analysis of standard reference milk samples from certified dairy laboratories. To determine the reference coefficient of variation (CV) % only such standard reference milk sample must be used. If nonstandard milk samples are used, a deviation of the CV% may be received. The standard reference milk samples do not include a large amount of cell fragments and do not include yeast cells.

Calculating Coefficient of variation (CV) %:

To calculate the Coefficient of variation (CV) %, following the above procedure, you have to test:

• 10 times milk sample with somatic cell concentration 50000-200000 cell/ mL;
• 10 times milk sample with somatic cell concentration 400000-600000 cell/mL;
• 10 times milk sample with somatic cell concentration 800000-1400000 cell/mL;

Then fill in the results in the table below.