To receive results with reference accuracy from somatic cell counting using LACTOSCAN SCC the following steps must be done:
Samples taking: Samples must be taken with accordance to the recommended sampling method given in ISO 707|IDF 50.
Samples storage: Samples must be stored with accordance to the recommendations in ISO 13366-1 | IDF 148-1:2008, page 4: “7.1 Storage Prior to testing or preservation, store the test samples at a temperature of 4 °C ± 2 °C.
Analyse the test samples within 6 h after sampling. In the case of longer storage, add chemical preservatives such as boric acid, bronopol or potassium dichromate. The final concentration of boric acid shall not exceed 0,6 g per 100 ml of test sample. The final concentration of bronopol shall not exceed 0,05 g per 100 ml of test sample. The final concentration of potassium dichromate shall not exceed 0,1 g per 100 ml of test sample. Store the thus preserved test samples at a temperature of 4 °C ± 2 °C for no longer than 6 days. For environmental reasons, it is recommended to restrict the use of potassium dichromate to samples that require a long shelf life only.” Note! Bronopol is the preferred preservative for preparing samples for analysis with LACTOSCAN SCC.