Potentiometric coated wire electrode for salicylate based on zinc(II) acetylacetonate

Journal of the Brazilian Chemical Society

Pourhakkak, P.¹  Yazd University, Yazd, Iran¹  Ardakani, M. Mazloum¹  Kashan University¹  Salavati-Niasari, M.¹ 

关键词: coated wire salicylate-selective electrode;    salicylate;    zinc(II) acetylacetonate;   

DOI  :  10.1590/S0103-50532007000400017

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

A coated-wire ion selective electrode based on zinc(II) acetylacetonate as ionophore exhibited linear response with Nernstian slope of –59.6 ± 1.0 mV/decade over a wide concentration range (1.0´10-5-1.0´10-1 mol L-1). This electrode has 5.0´10-6 mol L-1 detection limit. The proposed electrodes has a response time between 5-10 s to achieve a 95% steady potential for salicylate concentrations. The electrode was suitable for use in aqueous solutions in a wide pH range of 2.7 to 7.8. The electrode life time was tested over a period of two months to investigate its stability. No significant change in the performance of the electrode was observed during this period, but after two months, a gradual decrease ocurred in the slope. The proposed electrode showed high selectivity for salicylate over a number of common inorganic and organic anions. The electrode was successfully applied to the determination of salicylate in pharmaceutical samples.

【 授权许可】

Unknown