Effects of Surface Active Agents and Builders on Fastness to Washing of Antibacterial Agents in the Latest Commercial Anticrobial Treatment Products

Abstract

This paper describes the effects of surface active agent and builder on the fastness to washing of antibacterial agents in commercial anticrobial treatment products.The results obtained are as follows. (1) With regard to the effects of detergents on the fastness to washing of antibacterial agents, the antibacterial activity to Staphylococcus aureus IFO 3060 with sample No. 1 was large in the order of : washing with water, light duty detergent, liquid detergent, soap powder, according to inclinations of each regression curves. Because the width of clear zone when washed with detergent having high concentration of surface active agents is smallas shown in the results of antibacterial activity test. negative correlation was recognized between the concentration of surface active agents in detergents and the inhibition percent. This tendency was similer to other three test organisms. (2) With regard to the effects of the kind of surface active agent on the fastness to washing of antibacterial agents, the antibacterial activity to three test organisms with sample No. 2 was small in the order of : marseies soap, soap, AOS, AES, LAS, control washing with water. Furthermore, the builder also influences the antibacterial activity, the degree of the effect on the antibacterial activity was lager sodium tripolyphosphate than sodium silicate. And the additive effects by combining the surface active agent with the builder were recognized .As the antibacterial activity of antibacterial agents in commercial anticrobial treatment products, therefore, is lost rapidly by washing with the detergents having high concentration of surface active agents, such as soap powder, it is necessary to use the detergents having low concentration of surface active agents and builders to keep the antibacterial and antifungal activities of antibacterial angents.