文章基本信息

标题：Electrochemical Studies of New Pyridazinium-based Ionic Liquid and its Determination in Different Detergents
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作者：Ali F. Al-Ghamdi ; Mouslim Messali ; Saleh A. Ahmed 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2011
卷号：2
期号：3
页码：215-224
出版社：University of Mohammed Premier Oujda
摘要：A high sensitivity and reliable square wave -adsorptive stripping voltammetric (SW-AdSV) method was developed to determine new environmentally friendly pyridazinium-based ionic liquids, which were synthesized for the first time using microwave irradiation in short duration of time in quantitative yield. The chemical structure of the ionic liquid was confirmed on the basis of spectroscopic tool (NMR). The used SW-AdSV method is based on the adsorptive accumulation of the compounds at a hanging mercury drop electrode (HMDE) and then a negative sweep was initiated, which yield a well defined cathodic peak at –663 mV versus Ag/AgCl reference electrode. To achieve high sensitivity, various experimental and instrumental variables were investigated such as supporting electrolyte, pH, accumulation time and potential, scan rate, frequency, pulse amplitude, convection rate and working electrode area. The monitored adsorptive current was directly proportional to the concentration of ionic liquid and it shows a linear response in the range from 5 x 10-7to 1.1 x 10-5mol l-(correlation coefficient = 0.998) and the detection limit (S/N=3) is 1.1 x 10-9mol l-1 at an accumulation time of 30 sec. The developed SW-AdSV procedure shows a good reproducibility, the relative standard deviation RSD% (n=8) at a concentration level of 1.0 x 10-6mol l-1 was 1.75x 10-2%, whereas the method accuracy was indicated via the mean recovery of 100.2% ± 0.45. Possible interferences by several substances usually present with the ionic liquids have been also evaluated. The applicability of this approach was illustrated by the determination of ionic liquid (1) in different detergents such as detol, fairy, persil and vanish
关键词：Square wave;adsorptive stripping voltammetry; hanging mercury drop electrode; microwave ;irradiation; ionic liquids