METHOD OF DETERMINING TOTAL CONTENT OF PHENOLES IN WATERS Russian patent published in 2014 - IPC G01N21/78 

FIELD: chemistry.

SUBSTANCE: method includes taking of a sample, processing the sample with an excess of diazotised sulfanilic acid in an alkaline medium, measurement of the optic density of the coloured solution on an analytic wavelength and calculation of the total content of phenols in terms of elementary phenol, with a reaction between the phenols and diazotised sulfanilic acid being carried out at pH value =7.2÷8.5, the reaction mixture is held at a temperature T=20÷25°C, for not less than 10 min, the optic density is measured in the field of the wavelength λ=340÷370 nm.

EFFECT: invention ensures an increased accuracy of photometric determination of the total content of phenols in terms of elementary phenol.

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