کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1243874 969673 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sequential injection monosegmented flow voltammetric determination of cadmium and lead using a bismuth film working electrode
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Sequential injection monosegmented flow voltammetric determination of cadmium and lead using a bismuth film working electrode
چکیده انگلیسی

A cost-effective sequential injection monosegmented flow analysis (SI-MSFA) with anodic stripping voltammetric (ASV) detection has been developed for determination of Cd(II) and Pb(II). The bismuth film working electrode (BiFE) was employed for accumulative preconcentration of the metals by applying a fixed potential of −1.10 V versus Ag/AgCl electrode for 90 s. The SI-MSFA provides a convenient means for preparation of a homogeneous solution zone containing sample in an acetate buffer electrolyte solution and Bi(III) solution for in situ plating of BiFE, ready for ASV measurement at a flow through thin layer electrochemical cell. Under the optimum conditions, linear calibration graphs in range of 10–100 μg L−1 of both Cd(II) and Pb(II) were obtained with detection limits of 1.4 and 6.9 μg L−1 of Cd(II) and Pb(II), respectively. Relative standard deviations were 2.7 and 3.1%, for 11 replicate analyses of 25 μg L−1 Cd(II) and 25 μg L−1 Pb(II), respectively. A sample throughput of 12 h−1 was achieved with low consumption of reagent and sample solutions. The system was successfully applied for analysis of water samples collected from a draining pond of zinc mining, validating by inductively coupled plasma-optical emission spectroscopy (ICP-OES) method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 79, Issue 4, 15 September 2009, Pages 1118–1124
نویسندگان
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