A polyvinylchloride-based cadmium ion-selective electrode using [Mo-2(OAc)(2)(H-2-calix[4]arene)] as an electroactive material

作者：Tyagi Sonika; Agarwal Himanshu; Ikram Saiqa^*

来源：Water Science and Technology, 2010, 62(11): 2510-2518.

DOI：10.2166/wst.2010.774

• Cd2+ selective electrode
• electroactive material
• potentiometry
• PVC

A highly electroactive material Mo-2[(OAc)(2)(H-2-calix[4]arene)] is used as a neutral carrier for Cd2+ ions in this paper. The membrane is fabricated by using ionophore [Mo-2(OAc)(2) (H-2-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 +/- 1.0mV 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).

• 出版日期2010