DEVELOPMENT OF POTENTIOMETRIC SENSOR BASED ON NEUTRAL CARRIER AND THEIR PROPERTIES FOR SILVER ION DETECTION

Authors

  • Wanwisa Janrungroatsakul Naresuan University
  • Sajee Sawangsri
  • Bhudtree Wimonpun
  • Pawarana Kaewkul
  • Suphakan Thanomsak
  • Duangrat Thongkum

Keywords:

Potentiometric sensor, PVC membrane, Silver ion

Abstract

This research aimed to develop potentiometric sensor for silver ion detection based on neutral carrier L1 (chloro-8-[(pyridin-2-ylmethyl)-amino]-anthraquinone) in poly(vinyl chloride) (PVC) membrane plasticized with o-NPOE and KTpClPB was used as an ion exchanger. The results found that the best performance was observed for the membrane component of 0.35: 0.38: 33.08: 66.19 (L1: KTpClPB: PVC: o-NPOE, %w/w). It showed highly selective to silver ion with a complex formation constant (log bILn) between L1 and silver ion of 5.30±0.07. The polymeric membrane electrode exhibited near theoretical Nernstian slope of 59.50±0.3 mV decade-1 in a linear range from 1x10-5 to 1x10-2 mol L-1 with a limit of detection of 4.47x10-7 mol L-1. This electrode was used to measure the silver ion in a wide pH range of 4–8. Additionally, the fabricated electrode could be used as indicator electrode for potentiometric titration to determine chloride ion in vitamin B1 tablets compared to Mohr's method with no significant difference.

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Published

2020-08-13

How to Cite

Janrungroatsakul, W., Sawangsri , S. ., Wimonpun , B. ., Kaewkul , P. . ., Thanomsak , S. ., & Thongkum , D. . . (2020). DEVELOPMENT OF POTENTIOMETRIC SENSOR BASED ON NEUTRAL CARRIER AND THEIR PROPERTIES FOR SILVER ION DETECTION. PSRU Journal of Science and Technology, 5(2), 114–127. Retrieved from https://ph01.tci-thaijo.org/index.php/Scipsru/article/view/240840

Issue

Vol. 5 No. 2 (2020): May - August 2020

Section

Research Articles

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