Abstract
Peracetic acid was shown to be an effective sporicide when tested against spores of Bacillus subtilis SA22 (NCA 72-52). The D value decreased as the peracetic acid concentration was increased from 0·04–0·20% ( v v ). At each concentration the D value decreased as the temperature was increased. Synergistic sporicidal effects were observed when spores were exposed to combinations of peracetic acid (0·04–0·20%) plus hydrogen peroxide (5·9–23·6%) at 20°C. Increasing the hydrogen peroxide concentration did not significantly alter the synergistic sporicidal action observed although the D values for the four hydrogen peroxide concentrations tested were markedly different.
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