A Novel Sensitive Bulk Optode Based on 5-Br Salophen as an Ionophore for Determination of Zinc Ion in Real Samples

Journal of the Brazilian Chemical Society

Alian, Elham¹  Semnani, Abolfazl²  Firooz, Alireza³ 

[1] Shahrekord University, Shahrekord, Iran;University of Isfahan, Isfahan, Iran;University of Jiroft, Jiroft, Iran

关键词: optical sensor;    zinc ion;    UV-Vis spectrophotometry;    5-Br salophen.;   

DOI  :  10.21577/0103-5053.20170165

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

An optical sensing film was fabricated for sensitive determination of zinc ion in aqueous solutions. The optical sensor was prepared by synthesized ionophore, 5-Br salophen, dioctyl sebacate (DOS) as a plasticizer, sodium tetraphenyl borate (NaTPB) as a lipophilic anionic additive in a poly(vinyl chloride) membrane. The optode response is based on the cation-exchange membrane and indicated a significant absorbance signal change on the exposure to Britton-Robinson buffer solution of pH 5.7 containing Zn2+ ion. The proposed sensor showed a linear range of 4.9 × 10-5-4.5 × 10-12 mol L-1 with a limit of detection of 3.9 × 10-12 mol L-1. Furthermore, satisfactory analytical sensing characteristics including selectivity, stability, and reproducibility for the determination of zinc ion were obtained. The response time of the sensing film was less than 5 min, depending on the concentration of Zn2+ ions. The proposed sensor was successfully applied for determination of zinc in tap water, river water, and sea water.

【 授权许可】

CC BY