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347. The disinfection of contaminated metal surfaces with hypochlorite solutions

Published online by Cambridge University Press:  01 June 2009

F. K. Neave  and
W. A. Hoy
F. K. Neave
Affiliation:
National Institute for Research in Dairying, University of Reading
W. A. Hoy
Affiliation:
National Institute for Research in Dairying, University of Reading
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Extract

Tinned trays were artificially infected with Staphylococcus aureus in diluted milk and the dried surfaces disinfected by rinsing with sodium hypochlorite solutions.

Under the conditions described, which we believe approximate those on many dairy utensils which have been imperfectly cleaned, the pH of hypochlorite solutions was found not to be a very important factor in determining their germicidal efficiency. At pH 10 and 11, the solutions were equal to or slightly more efficient germicides than solutions at pH 7.

In the destruction of 99% of the organisms on the metal trays, a solution at pH 10, containing 200 p.p.m. available chlorine was about 7 times as rapid as one with 25 p.p.m. available chlorine.

Type
Original Articles
Information
Journal of Dairy Research , Volume 15 , Issue 1-2 , June 1947 , pp. 24 - 54
Copyright
Copyright © Proprietors of Journal of Dairy Research 1947

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