Experimental observation on the efficacy of compound sodium hypochlorite disinfectant in killing aerial bacteria

ObjectiveTo discuss the disinfecting efficacy of compound sodium hypochlorite disinfectant in killing the air bacteria.MethodsStaphylococcus aureus ATCC6538 and spores of Bacillus subtilis var. niger ATCC9372 were dispersed in the fog chest at the concentration of 1×108cfu/m3 for 5min,which were respectively divided into the control and experimental groups. During the experimental process 2000mg/L compound sodium hypchlorite disinfectant,which was applied to the experimental group Staphylococcus aureus ATCC6538 and spores of Bacillus subtilis var. niger ATCC9372,were respectively 2ml and 10ml. After collecting sample the bacterial eliminating rate is calculated according the experimental data.ResultsThe results show the compound sodium hypchlorite disinfectant eliminate bacterial rate is 9.98%、99.99%、99.99% and 100.00% after 2、5、7、10min in the Staphylococcus aureus ATCC6538 group,and when the disinfectant is used to Bacillus subtilis var. niger ATCC9372 group,the results indicate the eliminating rate is 88.45%、97.22%、99.98%、99.95% after 15、30、60、90 min.ConclusionThe compound sodium hypochlorite is the better aerial disinfectant and it would be more active foreground.