Voltammetric studies of hexachromic anion transfer reactions across micro-water/polyvinylchloride-2-nitrophenyloctylether gel interfaces for sensing applications

► Voltammetric studies of hexachromic anion transfer reactions across a microhole array liquid/gel interface. ► An extended potential window provided by using a novel hydrophobic organic supporting electrolyte. ► Cr(VI) selective detection via the facilitated transfer of HCrO4− using Aliquat 336. ► Excellent linear response over a wide dynamic range of Cr(VI) concentrations. ► Good detection limit with superb selectivity over other interfering anionic species.