Open AccessA Novel Terpolymer Membrane-Based Electrode Sensor for Selective Determination of Cd(II) Ions
Author(s) -
Geetu Gambhir,
Drashya Gautam,
Laishram Saya,
Amit Kumar,
Subodh Kumar,
Aarushi Singh,
Surendra Singh,
Ramesh Chandra
Publication year - 2022
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2022.23701
Subject(s) - chemistry , potentiometric titration , membrane , ion selective electrode , atom transfer radical polymerization , inorganic chemistry , selectivity , acrylate , electrode , aqueous solution , potentiometric sensor , titration , methyl acrylate , methyl methacrylate , copolymer , polymer , organic chemistry , biochemistry , catalysis
A new polymeric membrane sensor for Cd(II) ion based on methyl acrylate-acrylonitrile-methylmethacrylate terpolymer as membrane carrier has been synthesized via atom transfer radicalpolymerization (ATRP) method at 60 ºC. Preliminary investigation with the membrane exhibitedpromising selectivity for Cd(II) ion with a slope of 32.02 mV/decade and the same could be estimatedin the concentration range of 1 × 10-6 − 1 × 10-1 M in the working pH range of 4-6 for up to 90 days.The potentials generated across the membrane were reproducible and the response time was less thanone minute. The electrode works well even in a partially non-aqueous media. The effect of surfactantand detergent on the working of Cd(II) selective electrode was also studied. A decrease in potentialwas observed in the presence of appreciable amount of surfactant and detergent. Addition of plasticiserswas found to greatly improve the performance of membrane, best results being obtained with themembrane ratio (NaTPB:TP:TBP::1:100:06), exhibiting a working concentration range of 1 × 10-6 − 1× 10-1 mol L-1 with a short response time of 10 s. The proposed sensor shows significantly goodselectivity toward Cd(II) ion in comparison with some alkali, alkaline earth, transition and heavymetal ions. It was successfully employed as an indicator electrode in potentiometric titration ofcadmium(II) ions against EDTA solution.