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.基于双(4,4,4-三氟-1-(2-噻吩基1)-1,3-丁二酮)铜(II)反萃取，天然水中铜(II)形态分析的方法开发并应用于河水样品。结果表明，河水中大部分铜(II)以与天然配体的络合物形式存在。2.建立了一种基于分光光度法测定腐殖酸铜(II)络合能力的简便方法。二）。该方法使用停流系统，使我们不仅能够测定铜（II）络合能力，而且能够测定铜（II）-腐植酸络合物的稳定性。将所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)形成相当稳定的络合物。 3.建立了连续流分离镉(II)和锌(II)的系统。以双硫腙萃取为基础研制而成。所提出的流动系统具有两个提取线圈，一个前提取线圈和一个后提取线圈，通过相分离器串联连接。在正向萃取线圈中，镉(II)被萃取到有机相中，而锌(II)几乎未被萃取。在反萃取盘管中，镉(II) 被反萃取到水相中，而锌(II) 则保留在有机相中。因此，只需将样品溶液通过流动系统，就可以定量分离镉(II)和锌(II)。4.研制了附有电沉积柱的流动注射ESI-MS系统。该系统已成功应用于河水样品中铜(II)形态的分析。柱的电位控制使该方法能够区分游离铜 (II) 和铜 (II) 络合物。

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

渡良瀬川河川水の銅(II)錯化容量と溶存銅(II)のスペシエーショシ

渡良濑川水的铜(II)络合能力和溶解铜(II)形态

• 发表时间: 2002
• 期刊: 自然環境科学研究 15
• 作者: 板橋英之;板谷盛明;伊藤宏之;川本 博
• 通讯作者: 川本 博

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。