ELECTROCHEMICAL ANALYSIS METHOD Russian patent published in 2005 - IPC

FIELD: analytical methods.

SUBSTANCE: invention relates to quantitative determination of substances, which are components of reversible redox systems and consists in titration of a solution to be analyzed including measurement of consumed titrant volume by measuring current intensity using two platinum electrodes with their surface areas being at 1:2 ratio. When measuring current intensity, electrode with greater surface is first used as anode, after which polarity of electrodes is reversed and current intensity is remeasured using as anode electrode with lesser surface. Volume of titrant in end point (V_e.p.) is found from following formula: V_e.p = V(Sc-Sa)(1+i'/i")/(Sc-Sa*i'/i"), where V is volume of titrant solution added, Sa anode surface area, Sc cathode surface area, i' current intensity with greater electrode as anode, and i" current intensity with lesser electrode as anode.

EFFECT: simplified analytical procedure and improved measurement accuracy.

2 dwg, 3 tbl