Objectives To study the sterilizing and disinfecting performance of trichloro-isocyanuric acid effervescent disinfectant tablets.
Methods Observing the pH value, available chlorine content, stability, bactericidal test, field test and stimulating field test of this effervescent disinfectant according to the "Technical Standard for Disinfection (2002)".
Results The content of available chlorine of this effervescent disinfectant was 47.6%, which was decreased 4.2% after 14 d of storage at 54℃. With a concentration of 500 mg/L in the test liquid, the average killing logarithm for Staphylococcus aureus or Escherichia coli for 10 minutes was not less than 5.00; in a field test for killing natural bacteria on desktop for 10 minutes, the average killing logarithm value was 1.56; in stimulating field tests for killing Escherichia coli on fruits and vegetables and dinnerware disinfection for 30 minutes, the average killing logarithms were not less than 3.00. The results of an energy test showed that the minimum qualified concentration of this effervescent disinfectant for killing Staphylococcus aureus was 500 mg/L.
Conclusions The efficacy of the effervescent disinfectant was stable, which played a strong role in killing bacteria in the liquid and on the surface of objects, dinnerware and fruits and vegetables.
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