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THE EFFECT OF WATER HARDNESS AND TEMPERATURE ON WATER STERILIZATION BY MIXTURES OF DETERGENTS AND QUATERNARY AMMONIUM COMPOUNDS
Author(s) -
COUSINS CHRISTINA M.,
CLEGG L. F. L.
Publication year - 1956
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1956.tb00075.x
Subject(s) - distilled water , sterilization (economics) , ammonium , chemistry , hard water , compounding , nuclear chemistry , chromatography , materials science , organic chemistry , composite material , monetary economics , economics , foreign exchange market , foreign exchange
SUMMARY: Six QAC detergent mixtures and the QACs alone were tested for bactericidal efficiency in hard and distilled water, using E. coli as test organism, contact times of 1, 2 and 5 min and temperatures of 5, 10 and 17°. The efficiencies of the unformulated QACs were dissimilar. With all, 200 p/m in hard water was less efficient than 50 p/m in distilled water. The efficiencies of the QAC detergent mixtures were not related to that of the pure QAC, the efficiency of a QAC being increased by one detergent formulation and decreased by another. All materials were least efficient at 5°.