Objective To evaluate the effect of disinfection of a new environmental friendly and phosphate-free washing powder on various microorganisms and surface antigen of hepatitis B virus(HBsAg).
Methods Carrier quantitative kill experiment was conducted to determine the effect of disinfection in 1.0%(w/v), 5.5%(w/v), as well as 10.0%(w/v) washing powder solution on Escherichia coli, Staphylococcus aureus, Spores of bacillus subtilis var. neger and HBsAg, respectively.
Results The killing rate of 1.0% washing powder solution on E. coli was (99.90& #177;0.01)% during 10 min exposure and the killing rate of 10.0% washing powder solution on S. aureus was (99.90 & #177;0.01)% during 20 min exposure. However, the killing rate of 10.0% washing powder solution on the spores of B. subtilis var. neger was only (8.06 & #177;0.05)% during 40 min exposure, and the HBsAg did not be destroyed during 60 min exposure.
Conclusion Generally, the enhanced disinfection effect on microorganisms was obtained with the increasing in the concentration of the tested washing powder solution or the disinfectant contact time. In addition, the tested washing powder solution showed strong bactericidal effects on E. coli than S. aureus, but no significant disinfection effect on the spores of B. subtilis var. neger and HBsAg.
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