Novel potentiometric membrane sensor for the determination of trace amounts of chromium(III) ions

被引：0
作者：
Mohammad Reza Ganjali
Farhang Mizani
Masoud Salavati-Niasari
Mehran Javanbakht
机构：
[1] Department of Chemistry, Faculty of Science, Tehran University, Tehran
[2] Department of Chemistry, Faculty of Science, Kashan University, Kashan
[3] Department of Chemistry, Faculty of Science, Tarbiat Modarres University, Tehran
来源：
Analytical Sciences | 2003年 / 19卷 / 2期
关键词：
D O I：
10.2116/analsci.19.235
中图分类号：
学科分类号：
摘要：
A plasticized Cr3+ ion sensor by incorporating 2,3,8,9-tetraphenyl-1,4,7,10-tetraazacyclododeca-1,3,7,9-tetraene (TTCT) ionophore exhibits a good potentiometric response for Cr3+ over a wide concentration range (1.0 × 10-6 - 1.0 × 10-1 M) with a slope of 19.5 mV per decade. The sensor response is stable for at least three months. Good selectivity for Cr3+ in comparison with alkali, alkaline earth, transition and heavy metal ions, and minimal interference are caused by Li+, Na+, K+, Co2+, Hg2+, Ca2+, Pb2+ and Zn2+ ions, which are known to interfere with other chromium membrane sensors. The TTCT-based electrode shows a fast response time (15 s), and can be used in aqueous solutions of pH 3 - 5.5. The proposed sensor was used for the potentiometric titration of Cr3+ with EDTA and for a direct potentiometric determination of Cr3+ content in environmental samples.
引用
收藏
页码：235 / 238
页数：3
相关论文
共 23 条
  • [1] Flora M.D., Ricketts T.E., Wilson J., Kunkle S., Water Quality Criteria, (1984)
  • [2] Manahan S.E., Toxicological Chemistry, (1992)
  • [3] Toxicological Profile for Chromium, (1993)
  • [4] Singh A.K., Panwar A., Kumar S., Baniwal S., Analyst, 124, (1999)
  • [5] Velikanova T.V., Titov A.N., Malkova M.A., J. Anal. Chem., 56, (2001)
  • [6] Varshiney A., Tandon J.P., Polyhedron, 5, (1986)
  • [7] Umezawa Y., Umezawa K., Sato H., Pure Appl. Chem., 67, (1995)
  • [8] Rouhollahi A., Ganjali M.R., Shamsipur M., Talanta, 46, (1998)
  • [9] Ganjali M.R., Rouhollahi A., Mardan A.R., Hamzeloo M., Moghimi A., Shamsipur M., Microchem., 60, (1998)
  • [10] Fakhari A.R., Ganjali M.R., Shamsipur M., Anal. Chem., 69, (1997)
123