Thallium (I) ion selective membrane electrode based on dibenzopyridino- 18-crown-6. | [Journal of Chemical Society of Pakistan • 2007]

Author(s):

1. Javed Zolgharnein: Department of Chemistry, Arak University, Arak, Iran

2. Ghulam Azimi: Department of Chemistry, Arak University, Arak, Iran

3. Morteza Habibi: Department of Chemistry, Arak University, Arak, Iran

Abstract:

A new PVC membrane electrode for determination of thallium (I) ion based on dibenzopyridino-l8-crown-6 as membrane carrier was designed. The electrode exhibits a near Nerstian response (54.4 ± 0.2 mV/ decade) for TI+ over a wide concentration range (2.70 x 10-2 to 8.9 x I0-7M). It has very short response time and can be used for three months without observing any divergence. The proposed electrode revealed good selectivity for TI+ over a wide variety of other metal ions except for Ag+ and could be used in a pH range of 2.5 - 10. This electrode has been used as an indicator electrode in potentiometric titration of thallium (I) ion and in direct determination of it in spiked water samples.

Page(s): 487-491

DOI: DOI not available

Published: Journal: Journal of Chemical Society of Pakistan, Volume: 29, Issue: 5, Year: 2007

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