EXPERIMENTAL OBSERVATION ON GERMICIDAL PERFORMANCE OF A SOLID CHLORINE DIOXIDE DISINFECTANT

In order to observe the germicidal performance of a solid chlorine dioxide in binary packing, suspension and carrier quantitative germicidal tests were carried out in laboratory. The results showed that the solution containing chlorine dioxide 10.96 mg / L and 27.40 mg / L with a 5 min contact time killed 99.98% in average of Staphylococcus aureus and 99.99% in average of Candida albicans in suspension respectively. The average killing rates of spores of Bacillus subtilis var. niger in suspension exposed to the solution containing chlorine dioxide 21.92 mg / L and the spores exposed to the solution containing chlorine dioxide 548mg/L for 10 min attained 99.99% and 100% respectively. The chlorine dioxide content of the stock solu- tion of this activated chlorine dioxide disinfectant did not decrease significantly after storing at 56C for 14 days.