METHOD FOR QUANTITATIVE DETERMINATION OF LACTIC ACID BY VOLTAMMETRY ON GLASSY-CARBON ELECTRODE Russian patent published in 2014 - IPC G01N33/04 G01N33/15 G01N27/48 

FIELD: chemistry.

SUBSTANCE: lactic acid is transferred from a sample into a solution and voltammetric accumulation of lactic acid in the stirred solution is performed while bubbling with an inert gas for 30 s and with electroaccumulation potential of 1.2-1.4 V relative to a saturated silver chloride electrode on a background electrolyte of 0.1 M Na₂HPO₄, followed by detection of cathode peaks in differential mode of recording voltamperograms with potential sweep rate of 30-40 mV/s; concentration of lactic acid is determined from peak height in the potential range of 0.25-0.40 V by a standard addition method.

EFFECT: method is simple, does not require a large amount of reactants and labour costs.

2 ex, 1 tbl