Srovnani ucinnosti konzervacniho pripravku Milkofix s tradicnimi konzervacnimi prostredky pro ucely stanoveni poctu somatickych bunek ve vzorcich mleka fluoro-opto-elektronickou metodou.
1992
Hanus O. | Gencurova V. | Gabriel B. | Zvackova I.
Milkofix (M), a health friendly preservative substance used for milk sample preservation, was compared with other preservatives. Untreated milk samples (N) were tested against samples treated with sodium azide (A), bronopol (B), potassium dichromate (C) and Milkofix (M). In the treated milk samples taken from individual cows the values of SB counts were significantly higher than in N samples if determined within eight hours after sampling: in A higher by 18.6 %, B by 26.3 %, C by 26.4 % and M by 24.3 %. The significantly higher values of SB counts were recorded in bulk milk samples treated with preservatives in comparison with N samples immediately after sampling: in A by 6.O %, in B, C and M by 12.9 %. The effects of preservative concentrations on the results of SB counts were not observed at all because the values of samples treated with different concentrations of preservatives differed insignificantly from N samples. The following times of storage can be taken as convenient for the described method of treatment with a certain kind of preservative and temperature; I=2O degrees Celsius, II=4 degrees Celsius: N I-1 day; A I-3 days; B I -7 days; M I -3 days; N II -9 days; A II -15 days; B II -17 days; C II 17 days; M II -17 days. The best results were obtained in C treatment for both temperatures of storage, therefore potassium dichromate can be recommended, even if it is replaced by a less harmful preservative in routine analyses, for the preparation of control (pilot) samples for Fossomatic.
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