Cyclic voltammetric studies of a new 1-pentylpyridazinium bromide ionic liquid and its determination in detergents and sea water samples

Abstract

The cyclic voltammetry technique was used to electrochemically analysis 1-pentylpyridazinium bromide (PPB) ionic liquid on hanging mercury drop electrode (HMDE) νs Ag/AgCl as reference electrode using different electrolyte buffers such as Britton-Robinson (B-R), phosphate, acetate and carbonate under changing values of pH. A sharp cyclic voltammogram was observed at Eac=−0.65V as reduction wave in case of using phosphate buffer pH2.5. Other experimental conditions such as accumulation time and potential, sweep rate, voltage step, temperature, convection rate and area of working electrode surface were also evaluated. The cyclic voltammetric method has been explained an irreversibility of the reduction process and a characterize adsorption of analyte. The analytical performance of CV method for analysis of PPB was also evaluated in terms of studies of calibration curve, detection limit, recovery, stability and reproducibility. The calibration curve was studied over the range 1.0×10−5 to 5.0×10−4molL−1, r2=0.997 and n=13 under the optimum parameters. The detection limit was calculated to become a 6.4×10−7molL−1. Analyte was characterized a good stability within 180min inside of a good reproducibility for eight voltammetric measurements, so the relative standard deviation (RSD%) was also reported 0.33%. The cyclic voltammetric applications were directly done for determination of PPB ionic liquid in the detergents and sea water samples.