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N-phenylaza-15-crown-5 as Ionophore in PVC-Matrix for Fe2+ - Selective Sensor | ||
Journal of Physical & Theoretical Chemistry | ||
مقاله 6، دوره 1، شماره 4، اردیبهشت 2005، صفحه 39-45 اصل مقاله (181.96 K) | ||
نوع مقاله: Research Paper | ||
نویسندگان | ||
M. Aghaie* ؛ M. Giahi* ؛ H. Aghaie* ؛ M. Pournaghdy* | ||
Not-mentioned | ||
چکیده | ||
The preparation of polymer membrane selective to Iron(II) ion and its application to ion-selective electrode is reported here. PVC membrane contains Iron–selective N-phenylaza-15-crown-5 as ionophore. The membrane electrode is highly selective to Iron(II) ion and exhibit good linear response over a wide concentration range of 1.0 × 10-2 to 1.0 × 10-6 M with Nernstian slope of 29.2 ± 0.6 mV per decade. The detection limit of electrode is 2.5×10-6 M. It has a response time of <15 s and can be used for more than 2 months without any measurable divergence in potential. The proposed sensor shows fairly a good discriminating ability towards Fe2+ ion in comparison to some hard and soft metals. The electrode was applied to the determination of Fe2+ ions in the ferrous sulfate syrup. | ||
کلیدواژهها | ||
Fe+2-selective electrode؛ PVC membrane؛ Temperature coefficient؛ Potentiometry | ||
آمار تعداد مشاهده مقاله: 754 تعداد دریافت فایل اصل مقاله: 341 |