Investigation to Increase the Viricidal Capacity of Disinfectant, Germicidal and Fungicidal, Phenolic, Dry-Type
Final rept. 3 May 1973-28 Feb 1975
MAINE UNIV AT ORONO DEPT OF CIVIL ENGINEERING
Pagination or Media Count:
The straight O-D-1435 Type II disinfectant had little capacity to inactivate the poliovirus type I when used in concentrations up to 15,000 mgl with contact times up to 24 hours. The Coxsackie A9 and Echo 12 viruses showed no inactivation with 10,000 mgl of disinfectant and contact times of 30 minutes. An increase of the pH to more than 12 did potentiate the disinfectant for poliovirus inactivation. The survival at a pH of 12.1 with 10,000 mgl of disinfectant was less than 0.01 percent after 5 minutes of contact. The survival at this pH without the disinfectant was 58. Anionic surfactants in concentrations from 100 to 10,000 mg1 had little capacity for increasing the viricidal capacity of the disinfectant. Cationic and nonionic surfactants had no enhancement ability.