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Titanium (III) cation selective electrode based on synthesized tris(2pyridyl) methylamine ionophore and its application in water samples

Rezayi M 1 , Karazhian R 2 , Abdollahi Y 3 , Narimani L 4 , Sany SB 5 , Ahmadzadeh S 6 Show all authors , Alias Y 4

Affiliations 

  • 1 1] Chemistry Department, Faculty of Science, University Malaya, 50603 Kuala Lumpur, Malaysia [2] Food Quality and Safety Research Department, Food Science and Technology Research Institute, ACECR Mashhad Branch, 91775-1376 Mashhad, Iran
  • 2 Food Quality and Safety Research Department, Food Science and Technology Research Institute, ACECR Mashhad Branch, 91775-1376 Mashhad, Iran
  • 3 1] Chemistry Department, Faculty of Science, University Malaya, 50603 Kuala Lumpur, Malaysia [2] Material Synthesis and Characterization Laboratory, Institute of Advanced Technology, University Putra Malaysia, 43400, UPM, Serdang, Selangor, Malaysia
  • 4 Chemistry Department, Faculty of Science, University Malaya, 50603 Kuala Lumpur, Malaysia
  • 5 Institute of Biological Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia
  • 6 Department of Chemistry, Faculty of Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor D.E., Malaysia
Sci Rep, 2014;4:4664.
PMID: 24722576 DOI: 10.1038/srep04664

Abstract

The introduction of low detection limit ion selective electrodes (ISEs) may well pave the way for the determination of trace targets of cationic compounds. This research focuses on the detection of titanium (III) cation using a new PVC-membrane sensor based on synthesized tris(2pyridyl) methylamine (tpm) ionophore. The application and validation of the proposed sensor was done using potentiometric titration, inductively coupled plasma atomic emission spectrometry (ICP-AES), and atomic absorption spectrometry (AAS). The membrane sensor exhibited a Nernstian response to the titanium (III) cation over a concentration range of 1.0 × 10(-6)-1.0 × 10(-2) M and pH range from 1-2.5. The Nernstian slope, the lower of detection (LOD), and the response time (t95%) of the proposed sensor were 29.17 ± 0.24 mV/dec, 7.9 × 10-7 M, and 20 s, respectively. The direct determination of 4-39 μg/ml of titanium (III) standard solution showed an average recovery of 94.60 and a mean relative standard deviation of 1.8 at 100.0 μg/ml. Finally, the utilization of the electrodes as end-point indicators for potentiometric titration with EDTA solutions for titanium (III) sensor was successfully carried out.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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