Stability of 84 disinfectant under different storage condition
Objective To observe the effect of time and temperature on the concentration of available chlorine in a certain 84 disinfectant during storage.Methods The iodine assay was used to detect the changes of available chlorine concentration of a commercial 84 disinfectant after 12 weeks at 4,10,20,30 and 37 ℃.The degradation rate was calculated and the high fitting curve of the disinfectant was plotted.Results After 12 weeks storage at 4,10,20,30 and 37℃,the available chlorine concentrations of 84 disinfectant with initial available chlorine content of 72.31 g/L decreased to 59.90,58.13,55.60,45.72 and 38.63 g/L,respectively.The degradation rates of available chlorine were 17.16％,19.61％,23.10％,36.77％and 49.34％,respectively.The degradation rate of available chlorine in the first 5 weeks was significantly higher than that in the last 7 weeks at 5 storage temperatures.When the storage temperature was below 30℃,the available chlorine content was stable after 5 weeks.Conclusion The higher the temperature,the faster decrease of the effective chlorine concentration.At low concentration,decrease rate is relative slow,and the disinfectant is more stable.
万方数据
维普
