title: A polyvinylchloride-based cadmium ion-selective electrode using [Mo₂(OAc)₂(H₂-calix[4]arene)] as an electroactive material.
abstract: A highly electroactive material [Mo₂(OAc)₂(H₂-calix[4]arene)] is used as a neutral carrier for Cd²+ ions in this paper. The membrane is fabricated by using ionophore [Mo₂(OAc)₂(H₂-calix[4]arene)]:poly(vinyl chloride) (PVC): dibutylphthalate(DBP):sodium tetraphenyl borate (NaTPB) in the ratio of 40:300:470:5 respectively and tetrahydrofuran (THF) used as a solvent. The membrane electrode performed in the concentration range of 9.9 x 10⁻⁸-1.0 x 10⁻¹ M (2.34 x 10⁻⁵-23.64 mg/mL) having the Nernstian slope of 30.0±1.0 mV and the best detection limit was observed at 9.8 x 10⁻⁸ M (2.31 x 10⁻⁵ mg/mL). The proposed membrane electrode has the response time of 12 s and a useful working pH range of 1.0-7.0, and used over a period of 10 months and work satisfactorily in the test solution having 30% (v/v) non-aqueous content. Electrode sensor has distinguishable ability for Cd²+ ion with regard to several alkali, alkaline earth, transition and heavy metal ions. It was used in direct potentiometry as an indicator electrode, in the potentiometric titration of 10⁻³ M Cd²+ solution against 10⁻² M of ethylenediaminetetraacetic acid (EDTA).
authors.affiliation: Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia (Central University), New Delhi 110025, India.
authors.forename: Sonika
authors.initials: S
authors.lastname: Tyagi
authors.forename: Himanshu
authors.initials: H
authors.lastname: Agarwal
authors.forename: Saiqa
authors.initials: S
authors.lastname: Ikram
mesh_terms: D002104:Cadmium / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D047028:Macrocyclic Compounds / Q000737:chemistry*; D008567:Membranes, Artificial; D011143:Polyvinyl Chloride / Q000737:chemistry*; D013997:Time Factors; D014026:Nicotiana / Q000737:chemistry; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D007220:Industrial Waste; D047028:Macrocyclic Compounds; D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical; D002104:Cadmium; D011143:Polyvinyl Chloride