A kinetic study of the effect of hydrogen peroxide and peracetic acid against Staphylococcus aureus and Pseudomonas aeruginosa using the Bioscreen disinfection method

Hydrogen peroxide and peracetic acid at pH 4 were examined against Staphylo coccus aureus and Pseudomonas aeruginosa using the published 'Bioscreen' te chnique of biocide analysis. The data were examined using either classical Chick-Watson (CW) log-linear disinfection kinetics or the empirical, non-li near time Hom model. In some cases, modelling the data with the classical C W method gave good linear correlations, in others, however, deviations from this model were observed. In such cases the Hom model proved an adequate d escriptor of the data. The Bioscreen technique therefore gives data which c an be analysed using the normal mechanistic and empirical models currently available.