Iron-Selective Electrode Based on Phosphorylated Calix-6-Arene Derivative

• 作者: Ahmed Abd-Alhady Mohsen M. Zareh Wael Zordek
• 来源期刊: 传感技术(英文)
• 学科: 化学
• 关键词: Ferric ION Determination ION Selective ELECTRODE (ISE) PVC-Membrane
• 年，卷（期）: 2014,（4）
• 页码范围: 186-194
• 页数: 9页
• 分类号: O6

摘要

The construction and performance characteristics of a novel Iron(III) membrane sensor based on (37-bis-[(diethoxy-thiophosphoryl)-oxy]-5,11,17,23,29,35-hexa-kis-(1,1-dimethylethyl)-calix[6]-arene-38,39,40,41,42-pentol) (A) were reported in this paper. The sensor was prepared by incorporating compound (A) into a plasticized polyvinyl chloride PVC membrane. The electrode reveals a Nernstian behavior over a wide iron ion concentration range (1.0 × 10-2 - 1.0 × 10-4 mol·L-1), and relatively low detection limit (1.0 × 10-5 mol·L-1). The potentiometric response was independent on the pH of the solution in the range of 4 - 7. The electrode showed a very short response time (<5 s). It exhibited very good selectivity relative to a wide variety of metal cations. Correlation of selectivity coefficient values with ionic radii of interferent cations was discussed. The proposed iron- ISE was applied for analysis of iron containing samples with comparison to a recommended spectrophotometric method.