Determination of Paraquat Dichloride from Water Samples Using Differential Pulse Cathodic Stripping Voltammetry

被引:16
作者
Paramalinggam, Thanalechumi [1 ,2 ]
Yusoff, Abdull Rahim Mohd [1 ,3 ]
Qureshi, Munawar Saeed [4 ]
Shah, Zulfiqar Ali [4 ]
Sathishkumar, Palanivel [2 ]
Yusop, Zulkifli [2 ,5 ]
Khalid, Muhammad [4 ]
Khokhar, Faiz Mohammad [6 ]
机构
[1] Univ Teknol Malaysia, Fac Sci, Dept Chem, Utm Johor Bahru 81310, Malaysia
[2] Univ Teknol Malaysia, Ctr Environm Sustainabil & Water Secur IPASA, Res Inst Sustainable Environm RISE, Utm Johor Bahru 81310, Malaysia
[3] Univ Teknol Malaysia, Ctr Sustainable Nanomat, Ibnu Sina Inst Sci & Ind Res, Utm Johor Bahru 81310, Malaysia
[4] Khwaja Fareed Univ Engn & Informat Technol, Dept Chem, Rahimyar Khan 64200, Pakistan
[5] Univ Teknol Malaysia, Sch Civil Engn, Fac Engn, Utm Johor Bahru 81310, Malaysia
[6] Univ Sindh, Inst Adv Res Studies Chem Sci, Jamshoro 76080, Pakistan
关键词
voltammetry; electroanalytical; determination; accumulation potential; paraquat dichloride; CARBON; ELECTRODE; DIQUAT; BIOSENSOR; METHYL;
D O I
10.1134/S1023193518140069
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Paraquat dichloride commonly used as herbicide was determined by differential pulse cathodic stripping voltammetry technique. Experimental parameters, such as pH, accumulation time, accumulation potential and initial potential were optimized. In this analysis, paraquat dichloride exhibited a well-defined tworeduction peaks at -0.35 and -0.90 V in the pH range from 2.0 to 12.0. The 0.04 mol L-1 BR buffer at pH 2.0 was found a suitable medium for electroanalytical determination of the paraquat dichloride. Interfering ions effect was not significant. Linear calibration plots for standard solutions of paraquat dichloride were obtained in the range of 0.25 to 1.75 x 10(-6) mol L-1. Detection limit was 3.66 x 10(-8) mol L-1. The optimized parameters were effectively applied for the determination of commercial paraquat dichloride and in artificial samples. Artificial samples were prepared by spiking paraquat dichloride into tap water and drinking water dispenser samples. The recovery value was 90.5% in drinking water dispenser samples and 91.7% in tap water samples at the concentration range of 1.00 x 10(-6) to 1.75 x 10(-6) mol L-1.
引用
收藏
页码:1155 / 1163
页数:9
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