Calorimetric Determination of Volatile Reducing Substances

Authors

  • LIONEL FARBER,

    1. Seafood and Nutrition Research Laboratory, The G. W. Hooper Foundation University of California San Francisco Medical Center San Francisco, California 94122
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  • PETER LERKE

    1. Seafood and Nutrition Research Laboratory, The G. W. Hooper Foundation University of California San Francisco Medical Center San Francisco, California 94122
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Abstract

SUMMARY— The iodimetric procedure for determining the amount of reduction of an alkaline potassium permanganate solution which is used as a measure of the content of volatile reducing substances (VRS) has been substituted by a colorimetric one. The net absorbance at 610 mp is determined from the difference in absorbance between the unreacted and reacted 0.02N KMnO4 in N NaOH solution. The microequivalents of reduction corresponding to the net absorbance value is read off a graph showing the linear relationship between the net absorbance and the amount of VRS.

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