- 作者: 張敏, 吳峽, 柴雅琴, 袁若, 葉光榮
- 作者服務機構: Chongqing Key Laboratory of Analytical Chemistry, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
- 中文摘要: 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.
- 英文摘要: --
- 中文關鍵字: Mercury(II) ion-selective electrode; PVC membrane; Schiff base; Bis-salicyladehyde-diaminjodipropylamine; Potentiometry.
- 英文關鍵字: --