Development of an on-site speciation system for the speciation of heavy metal ions in natural water by r-FI method

开发通过 r-FI 方法对天然水中重金属离子进行形态分析的现场形态分析系统

• 批准号: 14550778
• 负责人: ITABASHI Hideyuki
• 金额: $ 2.24万
• 依托单位: Gunma University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550778/
• 关键词: speciation; flow system; humic acid; electrodeposition column; ESI-MS; river water; chelate extraction; 鉛(II); クロム(VI); 電解カラム; 陰イオン交換樹脂; フミン物質; 環境水; 重金属イオン

1.Based on a back-extraction of bis(4,4,4-trifluoro-1-(2-thieny1)-1,3-butanedionato)copper(II), a method for speciation of copper(II) in natural water was developed and applied to river water samples. The results indicated that the most of copper(II) in the river water existed as the complex with naturally occurring ligand.2.A simple method for evaluating the copper(II) complexing ability of humic acid was developed based on spectrophotometric determination of copper(II). The method, using a stopped-flow system, enabled us to determine not only copper(II) complexing capacity but also the lability of copper(II)-humic acid complex. The established method was applied to humic acid sample solutions, and the results revealed that the humic acids form a considerably stable complex with copper(II).3.A continuous flow system for the separation of cadmium(II) from zinc(II) was developed based on dithizone extraction. The proposed flow system has two extraction coils, a forward-extraction coil and a back-extraction coil, connected in series through a phase separator. In the forward-extraction coil, cadmium(II) was extracted into the organic phase while zinc(II) was hardly extracted. In the back-extraction coil, cadmium(II) was back-extracted into the aqueous phase while zinc(II) remained in the organic phase. Consequently, only passing the sample solution through the flow system, we were able to separate cadmium(II) from zinc(II) quantitatively.4.A flow injection ESI-MS system attached with electrodeposition column was developed. The system was successfully applied to the speciation of copper(II) in river water samples. Potential control of the column allowed this method to discriminate between free copper(II) and copper(II) complexes.

1.基于对BIS（4,4,4- trifluoro-1-（2- thieny1）-1,3-丁烷二苯甲酸）铜（II）的反萃取，开发了一种在天然水中对铜（II）进行物种形成的方法，并应用于河水样品中。结果表明，河水中的大部分铜（II）是具有天然存在配体的复合物。2。一种评估铜（II）的简单方法基于铜（II）的分光光度测定而开发了腐殖酸的络合能力。该方法使用停止流量系统，使我们不仅可以确定铜（II）络合能力，还可以确定铜（II） - 湿酸络合物的不稳定。已建立的方法应用于腐殖酸样品溶液，结果表明，腐殖酸与铜（II）形成相当稳定的复合物（II）.3.A基于二硫酮的含锌（II）的连续流动系统，用于从锌（II）中分离镉（II）。所提出的流动系统具有两个提取线圈，一个正向萃取线圈和一个通过相分离器串联连接的反萃取线圈。在正向萃取线圈中，将镉（II）提取到有机相中，而锌（II）几乎没有提取。在反萃取线圈中，将镉（II）反射到水相中，而锌（II）仍处于有机相。因此，只有通过样品溶液通过流量系统，我们才能定量地将镉（II）与锌（II）分离。4.a流动注入ESI-MS系统与电沉积柱相连。该系统成功地应用于河水样品中铜（II）的形态。列的潜在控制允许这种方法区分游离铜（II）和铜（II）配合物。

项目成果

Continuous flow system for separation of cadmium(II) from zinc(II) based on forward-and back-extraction processes

基于正向和反萃取过程的连续流动系统，用于从锌 (II) 中分离镉 (II)

• 发表时间: 2003
• 期刊: J.Flow Injection Analysis 20
• 作者: H.Itabashi;Y.Mesuda
• 通讯作者: Y.Mesuda

Evaluation of the copper(II) complexing ability of ultra filtered humic acid by solvent extraction method

溶剂萃取法评价超滤腐植酸络合铜(II)能力

• 发表时间: 2003
• 期刊: Analytical Sciences 19
• 作者: H.Itabashi;Y.Kamata;D.Kawaguchi;H.Kawamoto
• 通讯作者: H.Kawamoto

Stopped-flow method for evaluating copper(II) complexing ability of humic acid

断流法评价腐植酸络合铜(II)能力

• 发表时间: 2003
• 期刊: J.Flow Injection Analysis 20
• 作者: H.itabashi;H.Miyamae;H.Kawamoto
• 通讯作者: H.Kawamoto

H.Itabashi, Y.Mesuda: "Continuous Flow System for Separation of Cadmium(II) from Zinc(II) Based on Forward- and Back-Extraction Processes"J.Flow Injection Anal. 20. 193-196 (2003)

H.Itabashi、Y.Mesuda：“基于正向和反向萃取过程的镉 (II) 与锌 (II) 分离的连续流动系统”J.Flow Injection Anal。

H.Itabashi, Y.Kamata, D.Kawaguchi, H.Kawamoto: "Evaluation of the Copper(II) Complexing Ability of Ultrafiltered Humic Acid by the Solvent Extraction Method"Anal.Sci. 19. 1277-1280 (2003)

H.Itabashi、Y.Kamata、D.Kawaguchi、H.Kawamoto：“溶剂萃取法评价超滤腐植酸的铜 (II) 络合能力”Anal.Sci。