Interferant

In many cases, the absolute amount of the interferant is more effective to induce an observed interference than the interferant/analyte ratio.

Equation (1.15) may be used to evaluate the selectivity coefficient for that interferant.

In an aspect of the first embodiment, the auxiliary electrode is configured to electrochemically modify an electrochemical interferent to render the electrochemical interferent substantially electrochemically non-reactive at the working electrode.