Citation: Fu Chang WANG, Ya Qin CHAI, Ruo YUAN Chongqing. A Novel Tetraiodocadmate(Ⅱ)-PVC Membrane Electrode for the Potentiometric Determination of Cadmium(Ⅱ)[J]. Chinese Chemical Letters, ;2006, 17(7): 941-944. shu

A Novel Tetraiodocadmate(Ⅱ)-PVC Membrane Electrode for the Potentiometric Determination of Cadmium(Ⅱ)

Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715

Received Date: 23 November 2005

Fund Project: Thanks for the financial support of the Natural Science Foundation of Chongqing City (No. CSTC-2005 BB4100) and the Southwest University Foundation (XSGX02) for the present work.

A novel tetraiodocadmate(Ⅱ)-selective membrane electrode consisting of tetraiodo-cadmate(Ⅱ)-rhodamin B ion pair (TICRhB) dispersed in a PVC matrix plasticized with 2-nitrophenyl octyl ether (o-NPOE) was prepared. The sensor demonstrated a near-Nernstian response for 1×10^-2 to 2×10^-6 mol/L cadmium (Ⅱ) at 25℃ with an anionic slope of 29.0. Itrevealed very good selectivity for Cd²⁺ with negligible interference from many cations and anions,and could be used in a pH range of 3 to 6.
- Tetraiodocadmate(Ⅱ),
- ion pair,
- membrane electrode
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