Design and Construction of High-Sensitive and Selective Dysprosium(III) Electrochemical Membrane Sensor Based on a Thiourea Derivative

作者：Pourjavid Mohammad Reza^*; Sehat Ali Akbari; Rezaee Mohammad; Hosseini Majid Haji; Razavi Taherehsadat

来源：International Journal of Electrochemical Science, 2012, 7(6): 5133-5146.

• Membrane sensor
• Dy(III) selective
• Thiourea derivative
• PVC
• Potentiometry

A derivative of thiourea (DPDP) have been explored as a neutral ionophore for preparation a highly selective Dy(III) membrane sensor. The best performance was obtained with the sensor having membrane of DPDP-PVC-NaTPB-NB. The proposed sensor exhibits a Nernstian response over a wide concentration range (from 1.0x10(-7) to 5.0x10(-1) mol L-1 of Dy(III)). The detection limit of designed membrane is 3.9x10(-8) mol L-1. The sensor response is independent of pH of the solution in the pH range 3.4-8.2 and possess the advantages of fast response time and in particular, good selectivity and sensivity to the dysprosium ions with regard to most common metal ions, and especially all lanthanide ions. The sensor can be used over a period of 11 weeks without any considerable divergence in the potentials. It was applied successfully in the trace determination of Dy(III) ions in some binary mixtures, mouth washing solutions, soil and sediment samples.

• 出版日期2012-6