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Mohd Ismahadi bin Syono
Nano, MEMS and IC Design NST Department, MIMOS Berhad, Technology Park Malaysia, Kuala Lumpur 57000, Malaysia
Chemical Engineering, Chemistry & Bioengineering Chemistry

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Ag/AgCl Reference Electrode Based on Thin Film of Arabic Gum Membrane Sagir Alva; Aiman Sajidah binti Abdul Aziz; Mohd Ismahadi bin Syono; Wan Adil bin Wan Jamil
Indonesian Journal of Chemistry Vol 18, No 3 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.528 KB) | DOI: 10.22146/ijc.28859

Abstract

The Ag/AgCl reference electrode based on the Arabic Gum (AG) hydrogel films was successfully developed. The Arabic Gum concentration used in this study was 10–40% (w/v) with an optimum concentration of 20% (w/v). In this study, reference electrode performance testing is based on DmV response of Cl-ion’s measurements, stability tests and performance testing against ISE sensors such as K+, NH4+, and NO3-. The Ag/AgCl based reference electrode of the Arabic Gum film shows an average DmV of 4.0 ± 0.7 mV when response test is performed against a standard Ag/AgCl double junction electrode in various concentrations of Cl-ion’s. Meanwhile, in stability testing conducted in a 0.01 M KCl solution for 72 h found drift of < 0.6 mV/h. The reference performance test of the Arabic Gum reference electrode with three types of ISE NH4+, K+ and NO3- commercial sensors obtaining a slope closer to the Nernst value is 54.9 ± 0.9, 52.3 ± 0.5 and -53.2 ± 0.2 mV/dec with all having a linear distance of 0.1–10-5 M.
Co-Authors Aiman Sajidah binti Abdul Aziz Sagir Alva Wan Adil bin Wan Jamil