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phenol coefficient test

phenol coefficient test
A test to measure the effectiveness of disinfectants by comparing their activity against test bacteria with that of phenol.

Microbiology. . 2009.

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  • Phenol coefficient — is a measure of the bactericidal activity of a chemical compound in relation to phenol. When listed numerically, the figure expressing the disinfecting power of a substance by relating it to the disinfecting power of phenol may be a function of… …   Wikipedia

  • phenol coefficient — n a number relating the germicidal efficiency of a compound to phenol regarded as having an arbitrarily assigned value of 1 toward specified bacteria (as typhoid bacteria) under specified conditions * * * a measure of the bactericidal activity of …   Medical dictionary

  • test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …   Medical dictionary

  • coefficient — 1. The expression of the amount or degree of any quality possessed by a substance, or of the degree of physical or chemical change normally occurring in that substance under stated conditions. 2. The ratio or factor that relates a quantity… …   Medical dictionary

  • Rideal-Walker coefficient — The Rideal Walker coefficient is a figure expressing the disinfecting power of any substance and is obtained by dividing the figure indicating the degree of dilution of the disinfectant that kills a microorganism in a given time by that… …   Wikipedia

  • Rideal-Walker coefficient method (test) — Rid·e·al Walk·er coefficient, method (test) (ridґe əl wawkґər) [Samuel Rideal, English chemist, 1863–1929; J.T. Ainslie Walker, English chemist, 1868–1930] see phenol coefficient, under coefficient, and see under method …   Medical dictionary

  • Rideal-Walker test — Ri·de·al Walk·er test ri dē(ə)l wȯ kər n a test for determining the phenol coefficient esp. of a disinfectant Rideal Samuel (1863 1929), and Walker J. T. Ainslie (1868 1930) British chemists. Rideal taught chemistry and was an expert on the… …   Medical dictionary

  • Chick-Martin test — See under test. * * * a method for determining the phenol coefficient of disinfectants in water contaminated by organic matter; serial dilutions of disinfectant are incubated with a specified quantity of yeast and bacteria for a period of 30… …   Medical dictionary

  • rideal-walker test — rə̇ˈdē(ə)lˈwȯkə(r) noun Usage: usually capitalized R&W Etymology: after Samuel Rideal died 1929 & J.T.A.Walker English chemists : a test for determining the phenol coefficient especially of a disinfectant …   Useful english dictionary

  • Rideal-Walker method — a method for calculating the phenol coefficient of a disinfectant; cultures of Salmonella enterica subsp. enterica serovar Typhi are incubated with serial dilutions of the test compound, with dilutions of phenol as standards. Samples are removed… …   Medical dictionary