Study on germicidal efficacy of the compound peroxymonosulphate powder

To evaluate the germicidal efficacy of the compound peroxymonosulphate powder in vitro and to determine the effects of organic matter content,pH and temperature on its efficacy as a disinfectant,suspension quantitative germicidal test was used to carry out laboratory observation.The compound peroxymonosulphate powder demonstrated bactericidal activity against Escherichia coli,Klebsiella pneumoniae,Staphylococcus aureus,Pasteurella multocida and Streptococcus suis at concentrations ranging from 0.3125g/L to 2.5g/L,the killing rate on the bacterial suspension exposed to 2.5g/L of the compound peroxymonosulphate powder solution for 5min were all 100%;The minimal effective concentration of the disinfectant for E.coli and S.aureus killing in capacity test were 5g/L.And the minimal effective concentration of the disinfectant for P.multocida and S.suis killing in capacity test were 1g/L;Furthermore,the disinfectant was highly effective at higher temperature and acidic pH.High fetal bovine serum concentration was found to compromise the bactericidal activity of the disinfectant to different levels in E.coli and S.aureus.Results showed that the compound peroxymonosulphate powder had significant bactericidal activity against bacteria even at low concentration,and the increase of contact time,the solution concentration and temperature or the decrease of pH can improve the germicidal efficacy.