Potentiometric determination of Nickel (II) ion using 2-hydroxy-1-naphthylidene-N-cyanoacetohydrazone as electroactive material

Química Nova

Harish Kumar Sharma²  Pernita Dogra²  Akhilesh Kumar Gupta²  Fardad Koohyar¹ 

[1] ,Maharishi Markendeshwer University Engineering College Department of ChemistryAmbala,India

关键词: ion selective electrode;    Schiff's base;    Ni2+;    FIM;    potentiometric titration;   

DOI  :  10.5935/0100-4042.20140198

来源: SciELO

【 摘 要 】

A potentiometric Nickel sensor was prepared using 2-hydroxy-1-naphthylidene-N-cyanoacetohydrazone as electro-active material and epoxy resin as a binding material. A membrane composed of 40% Schiff's base and 60% epoxy resin exhibited the best performance. The membrane showed excellent response in the concentration range of 0.15 ppm to 0.1 mol L- 1 Ni+2 ions with non-Nernstian slope of 22.0 mV/decade, had a rapid response time (less than 10 s), and can be used for three months without any considerable loss of potential. The sensor was useful within the pH range of 1.3 to 9.6, and was able to discriminate between Ni2+ and a large number of alkaline earth and transition metal ions. The practical utility of the sensor has been demonstrated by using it successfully as an indicator electrode in the potentiometric titration of Ni2+ with EDTA and oxalic acid.

【 授权许可】

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