Preparation and Properties of a New Carbon Paste Iron Selective Electrodes and Their Applications
Preparation and Properties of a New Carbon Paste Iron Selective Electrodes and Their Applications作者机构：Chemistry Administration Cairo Egypt Chemistry Department Faculty of Science Cairo University Giza Egypt Hot Laboratory Center Atomic Energy Authority Cairo Egypt
出 版 物：《American Journal of Analytical Chemistry》 (美国分析化学（英文）)
年 卷 期：2014年第5卷第2期
页 面：140-148页
主 题：Triazol Ionophores Ferrous Ion Determination Modified Carbon Paste Electrodes
摘 要：The new ferrous-selective modified carbon paste electrodes (I and II) based on 5,5’-(propane-1,3-diylbis(sulfanediyl))bis(3-benzyl-4H-1,2,4-triazol-4-amine) (electrode I, A-ionophore) and 5,5’-(butane-1,4-diyl-bis(sulfane- diyl))bis(3-benzyl-4H-1,2,4-triazol-4-amine) (electrode II, B-ionophore) as ionophores are described. These electrodes exhibit Nernstian slopes of 30.2 ± 0.5 and 29.1 ± 0.5 mV·decade-1, linear range of 1.0 × 10-7 - 1.0 × 10-2 mol·L-1 Fe(II) ion and detection limit of 1.0 × 10-7 mol·L-1 Fe(II) ion for electrode (I) and electrode (II), respectively. Both electrodes (I and II) have a fast response time of about 15 sand can be used for at least 3 months. The two electrodes revealed a good selectivity for Fe(II) over a wide variety of other metal ions and could be used in the pH range of 1.8 - 3.0 without any divergence in potential. The proposed sensors were successfully applied for the determination of Fe(II) ion in different real samples.
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