差分脉冲吸附溶出伏安法同时测定锌电解液中铜(Ⅱ)、钴(Ⅱ)和镍(Ⅱ)
Simultaneous Determination of Copper(Ⅱ), Cobalt(Ⅱ) and Nickel(Ⅱ) in Zinc Electrolyte by Differential Pulse Adsorptive Stripping Voltammetry
摘 要
在含有亚硫酸钠的pH 8.8的氨水-氯化铵缓冲溶液中,丁二酮肟-锌体系与铜(Ⅱ)、钴(Ⅱ)和镍(Ⅱ)产生络合物吸附波,据此提出了差分脉冲吸附溶出伏安法测定锌电解液中铜(Ⅱ)、钴(Ⅱ)和镍(Ⅱ)含量的方法。结果表明:铜(Ⅱ)、钴(Ⅱ)和镍(Ⅱ)的峰电位分别在-0.65 V,-0.92 V和-1.06 V。铜(Ⅱ)、钴(Ⅱ)和镍(Ⅱ)的质量浓度分别在6.02×10-6~1.00×10-3,6.01×10-5~1.20×10-3,8.04×10-6~4.03×10-4g·L-1范围内与峰电流呈线性关系,检出限分别为9.41×10-7,1.14×10-5,5.48×10-6g·L-1。
锌试剂
差分脉冲吸附溶出伏安法
锌电解液
铜(Ⅱ)
钴(Ⅱ)
镍(Ⅱ)
Dimethylglyoxime
Zincon
Differential pulse adsorptive stripping voltammetry
Zinc electrolyte
Copper(Ⅱ)
Cobalt(Ⅱ)
Nickel(Ⅱ)
Abstract
In an NH3 (aq.) NH4Cl buffer solution of pH 8.8 containing Na2SO3, adsorptive complex waves of dimethylglyoxime-zincon system with Cu(Ⅱ), Co(Ⅱ) and Ni(Ⅱ) were observed. Based on this fact, a method of differential pulse adsorptive stripping voltammetry for the determination of Cu(Ⅱ), Co(Ⅱ) and Ni(Ⅱ) in zinc plant electrolyte was proposed. It was found that the peak potential of Cu(Ⅱ), Co(Ⅱ) and Ni(Ⅱ) complexes were obtained at -0.65, -0.92 and -1.06 V, respectively. Linear relationships between values of peak current and concentration were found in the range of 6.02×10-5-1.00×10-3g·L-1 for Cu(Ⅱ), 6.01×10-6-1.20×10-3g·L-1 for Co(Ⅱ), and 8.04×10-6-4.03×10-4g·L-1 for Ni(Ⅱ). Values of detection limits of Cu(Ⅱ), Co(Ⅱ) and Ni(Ⅱ) found were 9.41×10-7, 1.14×10-5 and 5.48×10-6g·L-1 respectively.
中图分类号 O657.32
所属栏目 工作简报
基金项目 国家高技术研究发展计划资助项目(863,No.2009AA04Z124)
收稿日期 2011/8/12
修改稿日期
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备注任凤莲(1946-),女,河南人,教授,主要从事冶金分析方面的研究。
引用该论文: REN Feng-lian,SHEN Fang,LI Yuan,CAO Fu-yue,PU Qiu-mei. Simultaneous Determination of Copper(Ⅱ), Cobalt(Ⅱ) and Nickel(Ⅱ) in Zinc Electrolyte by Differential Pulse Adsorptive Stripping Voltammetry[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2012, 48(9): 1033～1036
任凤莲,沈芳,李源,曹福悦,蒲秋梅. 差分脉冲吸附溶出伏安法同时测定锌电解液中铜(Ⅱ)、钴(Ⅱ)和镍(Ⅱ)[J]. 理化检验－化学分册, 2012, 48(9): 1033～1036
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参考文献
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【3】赖珞,丘福保,徐镇,等.微波消解-溶出伏安法对食品中铜、铅、镉的同时测定［J］.分析测试学报, 2010,29(2):203-206.
【4】谢跃生.导数阳极溶出伏安法连续测定冰醋酸中的铜、铅、锌［C］//第二届大西南分析化学学术会议论文集,西双版纳:中国化学会, 1998:267-269.
【5】于庆凯,李丹.阳极溶出伏安法同时测定海水中铜、铅、镉、锌［J］.化学工程师, 2009,169(10):25-27.
【6】刘保启,王玉春,胡孝忠,等.同时测定癌症病人血液中锌镉铅铜的微分脉冲阳极溶出伏安法［J］.分析测试学报, 2003,22(3):84-86.
【7】贺锋嘎,哈森其木格,白洪涛,等.2.5次微分溶出伏安法连续测定佝偻病儿童头发中的微量锌、镉、铅、铜、镍［J］.中国卫生检验杂志, 2001,11(2):138-139.
【8】ECONOMOU A, VOULGAROPOULOS A. Labview-based sequential-injection analysis system for the determination of trace metals by square-wave anodic and adsorptive stripping voltammetry on mercury-film electrodes［J］.Journal of Automated Methods & Management in Chemistry, 2003,25(6):133-140.
【9】FARGHALY O A, GHANDOUR M A. Square-wave stripping voltammetry for direct determination of eight heavy metals in soil and indoor-airborne particulate matter［J］. Environmental Research, 2005,97(3):229-235.
【10】FARGHALY O A. Direct and simultaneous voltammetric analysis of heavy metals in tap water samples at Assiut city: an approach to improve the analysis time for nickel and cobalt determination at mercury film electrode［J］. Microchemical Journal, 2003,75(2):119-131.
【11】GHONEIM M M, HASSANEIN A M, HAMMAM E, et al Simultaneous determination of Cd, Pb, Cu, Sb, Bi, Se, Zn, Mn, Ni, Co and Fe in water samples by differential pulse stripping voltammetry at a hanging mercury drop electrode［J］. Fresenius Journal of Analytical Chemistry, 2000,367(4):378-383.
【12】LOKESH S V, SHERIGARA B S, NAIK H S B, et al Voltammetric determination of trace metals Zn2+, Cd2+, Pb2+, Cu2+, Co2+ and Ni2+ in some medicinally important plants from Western Ghats, Karnataka State, India［J］. Environ Sci Eng, 2008,50(1):69-74.
【13】MONTICELLI D, CICERI E, DOSSI C. Optimization and validation of an automated voltammetric stripping technique for ultratrace metal analysis［J］. Anal Chim Acta, 2007,594(2):192-198.
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