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

Química Nova

Maharishi Markendeshwer University, Ambala, India¹  Sharma, Harish Kumar¹  Dogra, Pernita¹  Koohyar, Fardad¹  Gupta, Akhilesh Kumar¹  Islamic Azad University, Amol, Iran¹ 

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

DOI  :  10.5935/0100-4042.20140198

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown