Silver(I)-selective membrane potentiometric sensor based on two recently synthesized ionophores containing calix[4]arene |
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Authors: | M Aghaie M Giahi H Aghaie A Atryan |
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Institution: | (1) Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran;(2) Department of Chemistry, Faculty of Science, Lahijan Branch, Islamic Azad University, P.O. Box: 1616, Lahijan, Iran;(3) Department of Chemistry, Science and Research Campus, Islamic Azad University, P.O. Box: 14515-775, Tehran, Iran |
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Abstract: | Two new PVC membrane electrodes that are highly selective to Ag(I) ions were prepared using (L1) calyx4]arene (L2) as two suitable neutral carriers. The silver(I) ion selective electrodes exhibit a good response for silver ion over a wide
concentration range of 1.0 × 10−1 to 4.2 × 10−6 M (L1) and 1.0 × 10−1 to 6.5 × 10−6 M (L2) with a Nernstian slope of 60 mV per decade (L1) and 58 mV per decade (L2) at 25°C, and was found to be very selective, precise, and usable within the pH range 4.0–8.0. They have a response time
of <15 s and can be used for at least 3 months without any measurable divergence in potential. The proposed sensors show a
fairly good discriminating ability towards Ag+ ion in comparison to some hard and soft metal ions. The electrodes were used as indicator electrodes in the potentiometric
titration of silver ion and in the determination of Ag+ in photographic emulsion and radiographic and photographic films.
Published in Russian in Elektrokhimiya, 2009, Vol. 45, No. 7, pp. 862–868.
The article is published in the original. |
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Keywords: | silver(I)-selective electrode photographic PVC membrane calyx[4]arene |
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