METHOD OF MERCURY IDENTIFICATION BY CATHODE-ANODE VOLTAMMETRY Russian patent published in 2014 - IPC G01N27/48 

FIELD: chemistry.

SUBSTANCE: method of mercury identification by cathode-anode voltammetry with the application of an electrode and background solutions includes the following succession of actions. First, a glassy carbon electrode is kept in a background solution at a potential from -0.4 to - 0.7 V for 120 s, then it is switched to a potential from + 0.4 to + 0.5 V and is kept for 10 s with the following registration of voltamperogram with a linear involute of the potential in the range from 0.4 V at 100 mV/s and a peak of the mercury reduction, observed at the potential in ranges (-0.05-0.05) V, and linear dependent on the mercury concentration in water solutions. A mercury signal is registered and evaluated by a method of additives of certified solutions relative to a saturated silver chloride electrode.

EFFECT: invention makes it possible to determine a small quantity of mercury in a water solution by the method of cathode-anode voltammetry.

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