Chlorine residues in farm milk following the use of two disinfectants of different solubilities.
The incidence of chlorine residues in milk derived from two kinds of chlorine-based disinfectants of differing solubilities was investigated by Wode's test in a total of 420 samples from 30 dairy farms using milk tanks in December 1976 and January 1977. The less soluble of the two disinfectants caused a positive reaction for free chlorine in 4.29 per cent and a weakly positive reaction in 20 per cent of the 210 samples tested. The readily soluble disinfectant caused a weakly positive reaction only, in 3.33 per cent of the samples tested. The difference was statistically significant. In cases where Wode's test gave a positive or a weakly positive reaction, the identification test for antibiotics and chemotherapeutics was made by agar diffusion tests. The results showed that chlorine residues in milk cause small inhibition zones.
D000818:Animals; D000900:Anti-Bacterial Agents / Q000032:analysis; D002417:Cattle; D002713:Chlorine / Q000032:analysis; D003612:Dairying; D004202:Disinfectants; D005260:Female; D005506:Food Contamination; D008892:Milk / Q000032:analysis; D012995:Solubility
D000900:Anti-Bacterial Agents; D004202:Disinfectants; D002713:Chlorine