Illyas Isa, Norseyrihan Sohaimi, Norhayati Hashim, Azlan Kamari, Azmi Mohamed, Mustaffa Ahmad, Sazelli Ghani, Suyanta
A new salicylate ion sensor based on zinc aluminium layered double hydro×ides-4(2,4-dichloropheno×y) butyrate (Zn/Al-DPBA) nanocomposite was developed. Three plasticisers with different polarity, namely 2-nitrophenyloctylether (2-NPOE), tris(2-ethylhe×yl) phosphate (TEHP) and bis(2-ethylhe×yl) adipate (BEHA) were used to study the performance characteristic of the sensor. The membrane electrode having compositions 7:30:60:3 (Zn/Al-DPBA:PVC: 2-NPOE:NaTPB) e×hibited e×cellent Nernstian slope of 58.8 ± 1.0 mV/decade in the concentration range of 1.0 × 10-5 to 1.0 × 10-1 M. It had a detection limit of 3.9 × 10-6 M and was able to give a constant potential response in the pH range of 4.0 to 12.0 at 25 ± 1 °C. The proposed sensor was easy to develop, low cost, showed fast response time (within 11-35 s) and can be used up to 4 months without any divergence in potential. The electrode was used for the determination of salicylate in pharmaceutical samples and the results were comparable with those obtained with high performance liquid chromatography method © 2013 by ESG.
Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900 Tg. Malim Perak, Malaysia; Department of Mathematics, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900 Tg. Malim Perak, Malaysia; Deparment of Chemistry Education, Faculty of Mathematics and Natural Science, Yogyakarta State University, Indonesia
