An uranyl solid state PVC membrane potentiometric sensor based on 4,13-didecyl-1,7,10,16-tetraoxa-4,13-diazacyclooctadecane and its application for environmental samples

作者：Ghanbari Mehrnoush; Rounaghi Gholam Hossein^*; Ashraf Narges

来源：International Journal of Environmental Analytical Chemistry, 2017, 97(2): 189-200.

DOI：10.1080/03067319.2017.1279612

• UO22+ ion
• Kryptofix 22DD
• ion-selective electrode
• potentiometry

An ion-selective membrane electrode based on 4,13-didecyl-1,7,10,16-tetraoxa-4,13-diazacyclooctadecane (Kryptofix 22DD) incorporated into a polyvinyl chloride (PVC) membrane has been constructed. The electrode was prepared by a membrane containing dibutylphetalate (DBP) as plasticiser, Kryptofix 22DD as an ionophore, graphite powder as an additive and PVC as a matrix. Under the optimised membrane composition, the constructed electrochemical sensor shows the best response characteristics with a Nernstian behaviour over the concentration range of 1.0x10(-4)-1.0x10(-1)molL(-1) of solution, with a detection limit of 1.20x10(-5)molL(-1). The electrode is applicable in the pH range of 1.5-4. It has a fast response time of about 10s and can be used for at least 12weeks without any considerable spellcheck in its potential response. The fabricated electrode reveals a good selectivity towards the ion in the presence of several cations in solution and also, it could be applied for determination of this ion in real samples.

• 出版日期2017-2