A Novel Ion-Selective Electrode for Determination of the Mercury(II) Ion Based on Schiff Base as a Carrier
M. Zhang
Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
College of Chemistry, Changchun Normal University, Changchun City, Jilin Province, P. R. China
Search for more papers by this authorX. Wu
Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
Search for more papers by this authorY. Q. Chai
Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
Search for more papers by this authorCorresponding Author
R. Yuan
Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
Tel: +86-23-68252277; Fax: +86-23-68254000Search for more papers by this authorG. R. Ye
Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
Chongqing Fire Department, Chongqing 401121, P. R. China
Search for more papers by this authorM. Zhang
Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
College of Chemistry, Changchun Normal University, Changchun City, Jilin Province, P. R. China
Search for more papers by this authorX. Wu
Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
Search for more papers by this authorY. Q. Chai
Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
Search for more papers by this authorCorresponding Author
R. Yuan
Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
Tel: +86-23-68252277; Fax: +86-23-68254000Search for more papers by this authorG. R. Ye
Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
Chongqing Fire Department, Chongqing 401121, P. R. China
Search for more papers by this authorAbstract
A new poly(vinyl chloride) (PVC) membrane ion-selective electrode based on bis-salicyladehyde-diaminjodipropylamine (BSDDA) as an ion carrier was successfully applied to the detection of Hg2+ ions. This electrode displayed good selectivity toward Hg2+ in comparison with other metal ions and exhibited a Nernstian slope of 30.5 ± 0.4 mV per decade of Hg2+ over a concentration range of 9.5 × 10−7 to 6.4 × 10−2 M of Hg2+ in the pH range 1.5 to 3.5. The detection limit was 7.0 ± 0.2 × 10−7 M and response time was about 10 s to 25 s. The electrode can be used at least 2 months without apparent divergence in potential. In addition, the effects of experimental parameters such as membrane composition, nature and amounts of plasticizer and additive were investigated. The proposed electrode could be used as an indicator electrode in the detection of Hg2+ in samples.
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