高等学校化学学报

高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (1): 27.

• 论文 • 上一篇    下一篇

异菸酸十六烷酯作中性载体的镍离子选择电极

袁若1, 吴海龙1, 俞汝勤1, 章咏华2, 吴金兰2   

  1. 1. 湖南大学化学化工系, 长沙, 410082;
    2. 中国科学院长春应用化学研究所
  • 收稿日期:1991-02-21 出版日期:1992-01-24 发布日期:1992-01-24
  • 通讯作者: 俞汝勤
  • 基金资助:

    国家自然科学基金;中国科学院长春应用化学研究所电分析化学开放研究实验室资助

A New Nickel Ion Selective Electrode with Hexadecyl Iso-nicotinate as a Neutral Carrier

YUAN Ruo1, WU Hai-long1, YU Ru-qin1, ZHANG Yong-hua2, WU Jin-Ian2   

  1. 1. Department of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082;
    2. Changchun Institute of Applied Chemistry, Academia. Sinica, Changchun
  • Received:1991-02-21 Online:1992-01-24 Published:1992-01-24

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被引次数

5

摘要： 本文报道了一种镍离子选择性电极,它以我们合成的异菸酸十六烷酯作中性载体,该电极对浓度范围为10-1～8×10-5mol/L的镍离子有线性响应,斜率为-25.5±0.4mV/pC(Ni)2+(20℃).相对于钠、钾、锂、钙、锡、铁、钴、铜离子的选择性系数分别为:8.1×1-5、8.6×10-5、8.2×10-5、4.1×10-3、7.5×10-4、3.2×10-2、8.0×10-2、4.4×10-1.电极重现性优良,响应较快,用交流阻抗法研究了电极膜的传导机理,实验结果表明电极过程受扩散过程控制。

关键词: 异菸酸十六烷酯, 镍离子选择电极, 中性载体

Abstract: The present paper describes a new nickel ion selective electrode with a neutral carrier, hexadecyl iso-nicotinate synthesized in our laboratory.The electrode shows a linear response to Ni2+ ions in the range of 10-1 ~ 8×10-5 mol/Lwith a slope -25.5 ± 0.4 mV/pC(20±1℃).The potentiometric selectivity coefficients for nickel ions with respect to Na+, K+, Li+, Ca2+, Sn2+, Fe2+, Co2+ and Cu2+ are 8.1×10-5, 8.6×10-5, 8.2×10-5, 4.1×10-3, 7.5×10-4, 3.2 × 10-2, 8.0 × 10-2 and 4.4 × 10-1, respectively.The electrode has a fair reproducibility and quick potential response.The conductivity mechanism of the membrane was studied with A.C.impedance method.The experimental results show that the transfer process of Ni2+ ions across the solvent polymeric membrane is controlled by the diffusion process.

Key words: Hexadecyl iso-nicotinate, Nickel ion selective electrode, Neutral carrier

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