Development of a New Copper(II) Ion-selective Poly(vinyl chloride) Membrane Electrode Based on 2-Mercaptobenzoxazole

Bulletin of the Korean chemical society

Mehrorang Ghaedi¹  Javad Tashkhourian¹  Morteza Akhond¹ 

关键词: Copper(II) ion-selective electrode;    Ion sensor;    PVC membrane;    Potentiometry;    2-Mercaptobenzoxazole;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Copper(II) ion-selective PVC membrane electrode based on 2-mercaptobenzoxazole as a new ionophore and o-nitrophenyl octyl ether (o-NPOE) as plasticizer is proposed. This electrode revealed good selectivity for Cu²⁺ over a wide variety of other metal ions. Effects of experimental parameters such as membrane composition, nature and amount of plasticizer, and concentration of internal solution on the potential response of Cu²⁺ sensor were investigated. The electrode exhibits good response for Cu²⁺ in a wide linear range of 5.0 �? 10^-6-1.6 �? 10^-2 mol/L with a slope of 29.2 �? 2.0 mV/decade. The response time of the sensor is less than 10 s, and the detection limit is 2.0 �? 10^-6 mol/L. The electrode response was stable in pH range of 4-6. The lifetime of the electrode was about 2 months. The electrode revealed comparatively good selectivities with respect to many alkali, alkaline earth, and transition metal ions.

【 授权许可】

Unknown