Flow Injection Analysis on Extraction of Trace Metal Ions with Mixed Solvents

混合溶剂萃取痕量金属离子的流动注射分析

• 批准号: 08455388
• 负责人: WADA Hiroko
• 金额: $ 3.71万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455388/
• 关键词: Mixed Solvent; Ion Association Extraction; Formation Constant of Ion Associate; Partition Constant of Ion Associate; PAN-S; Reversed-Phase Ion-Pair HPLC; 1-Octanol; Octane; α-PAN-4S; テトラブチルアンモニウム

The present research was carried out in order to obtained the fundamental and important informations for the development of new flow injection analysis on solvent extraction. We had the following informations.1. Evaluation of a non-halogenated mixed solvent in the extraction of a complex(extractability, phase-separating ability)Taking account of the sensitivity and stability of metal complex and the selectivity in the extraction of the complex, pyridylazonaphthol-sulfonic acid system was selected. In addition to the selectivity on the basis of the partition equilibrium, the formation reaction of anionic metal complex in the aqueous phase enhances the selectivity of the extraction of metal ions. Up to this time, halogenated solvents such as chloroform have been exclusively used for ion association extraction. From the point of view of the ecopolicy, these solvents are undesirable for use. These solvents should be controlled regarding their use as much as possible. Then, some alternative … More s to these solvents were examined with copper (II) -PAN-S system, and it was found that 1-ocatnol/octane mixed solvent could be expected to have good extractability and good phase-separating ability. In addition, it was clarified that the partition of ion associate could be controlled by changing the mixing ratio of these solvents.2. Evaluation of complexing agent on the selective extraction of metal ions (use of HPLC)The formation constants of ion associates in the aqueous phase and their partition constants, which were scarcely determined so far, could be estimated by an detailed analysis of extraction equilibrium for the copper (II)-PAN-S system. The assessment of each complexing agent was achieved on HPLC systems from the point of the correlation between the partition constants of ion associates in the liquid-liquid partition and their capacity factors in HPLC.In the partition of ion associates for iron, cobalt, nickel, and copper complexes with a few kinds of pyridylazo compounds to the reversed-phase stationary phase, copper and cobalt complexes in the PAN-S systems were hardly retained even under the presence of a counter ion, and the partition of these ion pair was found to be markedly lower than that of iron and nickel complexes. The useful flow injection analysis syatem on the extraction of a metal complex is expected to be developed by a combination of these reagents and the mixed solvents described above. Less

本研究旨在为发展新型的溶剂萃取流动注射分析技术提供基础和重要的信息。我们有以下信息。1.非卤代混合溶剂萃取络合物的评价（萃取能力、分相能力）综合考虑金属络合物的灵敏性、稳定性和萃取的选择性，选择了吡啶偶氮萘酚-磺酸体系。除了基于分配平衡的选择性之外，水相中阴离子金属络合物的形成反应增强了萃取金属离子的选择性。到目前为止，卤化溶剂如氯仿已专门用于离子缔合萃取。从生态政策的观点来看，这些溶剂不适合使用。应尽可能控制这些溶剂的使用。那么，一些替代方案 ...更多信息 结果表明，1-辛醇/正辛烷混合溶剂具有良好的萃取性能和相分离能力。此外，还阐明了通过改变这些溶剂的混合比例可以控制离子缔合物的分配.络合剂对金属离子选择性萃取的评价（使用高效液相色谱法）水相中离子缔合物的形成常数及其分配常数迄今为止很少测定，可以通过对铜（II）-PAN-S体系萃取平衡的详细分析来估计。从离子缔合物在液-液分配中的分配常数与其容量因子的相关性出发，对各种络合剂在HPLC系统上的性能进行了评价，在铁、钴、镍、铜与几种吡啶偶氮化合物的离子缔合物在反相固定相中的分配中，PAN-S体系中的铜和钴络合物即使在反离子存在下也几乎不被保留，并且发现这些离子对的分配明显低于铁和镍络合物。这些试剂与上述混合溶剂的组合有望发展出萃取金属络合物的流动注射分析系统。少

项目成果

Akio YUCHI: "Adsorption Mechanism of Trivalent Metal Ions on Chelating Resins Containing Iminodiacetic Acid Groups with Reference to Selectivity" Analytical Chemistry. 69. 2941-2944 (1997)

Akio YUCHI：“三价金属离子在含有亚氨基二乙酸基团的螯合树脂上的吸附机制与选择性”分析化学。

Hiroshi NIWA: "Separation and Simultaneous Determination of Cobalt, Nickel and Copper with 2-(4-Methyl-2-quinolylazo)-5-diethylaminophenol by Reserved-Phase High-Performance Liquid Chromatography." Talanta. 45. 349-355 (1997)

Hiroshi NIWA：“通过保留相高效液相色谱法用 2-(4-甲基-2-喹啉基)-5-二乙氨基苯酚分离并同时测定钴、镍和铜。”

Hiromichi YAMADA: "Utility of an Octane/1-Octanol MIxed Solvent for the determination of Formation and Partition Constants of Ion Associates in the Extraction of Copper (II) with 2- (2-Pyridylazo) -1-naphthol-4-sulfonic Acid and with Tetrabutylammonium Ca

Hiromichi YAMADA：“使用辛烷/1-辛醇混合溶剂测定用 2-(2-吡啶基偶氮)-1-萘酚-4-磺酸萃取铜 (II) 时离子缔合体的形成和分配常数

Hiroshi NIWA: "Retention Behavior of Anionic Complexes of Cobalt (III) in Reversed-Phase HPLC.Importance of Local Charge Distribution within the Complex" Analytical Sciences. 13. 643-645 (1997)

Hiroshi NIWA：“反相 HPLC 中钴 (III) 阴离子配合物的保留行为。配合物内局部电荷分布的重要性”分析科学。

Hiroshi NIWA: "Retention Behavior of Anionic Complexes of Cobalt (III) in Reversed-Phase HPLC. Importance of Local Charge Distribution within the Complex" Analytical Sciences. 13. 643-645 (1997)

Hiroshi NIWA：“反相 HPLC 中钴 (III) 阴离子配合物的保留行为。配合物内局部电荷分布的重要性”分析科学。