A sensitive procedure for the rapid electrochemical determination of Eosin-Y Dye using voltammetric techniques at a mercury electrode

A sensitive adsorptive stripping procedure (square wave adsorptive stripping voltammetry),was used to check the adsorption property of eosin-y dye on a hanging mercury drop electrode (hmde) and its determination in selected samples.in addition,differential pulse polarography and cyclic voltammetry were used to evaluate the electrochemical preliminary studies of eosin-y dye. by employing the adsorptive stripping voltammetric method,a sensitive electroanalytical method for the quantitative analysis of this dye was achieved. a well-developed voltammetric peak probably related to thecathodic reduction of carbonyl group was obtained in ph (5) acetate buffer at -550 mv. the cyclic voltammetric studies indicated that the reduction process was irreversible and primarily controlled by adsorption. the adsorptive voltammetric current was evaluated with respect to various experimental conditions and the optimal values estimated at electrolyte(acetate buffer),ph (5),30 s accumulation time,0.0 v accumulation potential,400 mvs-1 scan rate,80 mv pulse amplitude and 60 hz square wave frequency. adsorptive voltammetric peak current showed a linear response for eosin-y in the concentration range of 5.0×e10-8 and 5.0×e10-7 mol l-1 (r = 0.99). a limit of detection of 8.73×e10-10 mol l-1 (0.566ppb) with relative standard deviation of 0.64 rsd% and mean recovery of 107%±1.6 were achieved. possible interferences with several dyes such as food additive azo dyes (e110,e102) and amaranth,and some metals such as cu+2 and zn+2were also examined. the suggested electrochemical procedure was successfully applied for the analysis (recovery) of this dye in commercially available dirt remover and sea water.