Mechanistic Analysis of Chelate Extraction Using a Single Water Microdroplet/oil System by Microchemical Analysis Technique

• Project/Area Number: 26410144
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Analytical chemistry
• Research Institution: University of Tsukuba
• Principal Investigator: NAKATANI Kiyoharu 筑波大学, 数理物質系, 教授 (00250415)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: キレート抽出 / 微小液滴 / 顕微分光 / 微小電極

Outline of Final Research Achievements

Using a cadmium-deposited microelectrode with a recess (diameter of 20 μm, depth of 10 μm), an electrochemically generated cadmium(II) ion in a water microdroplet injected into the recess by microcapillary manipulation-injection technique was reacted with a 5-octyloxymethyl-8-quinolinol (HC8Q) in 1,6-dichlorohexane. The fluorescence intensity of Cd(C8Q)2 in the vicinity of the water-microdroplet/oil interface was analyzed by a confocal fluorescence microscope. Based on the kinetic analysis of the time dependence of the fluorescence intensity, the rate-determining step of the extraction rate was shown to be Cd(C8Q)+ desorption at the water-microdroplet/oil interface.

Research Products

• [Journal Article] Kinetic Analysis of Solvent Extraction of Cadmium(II) Complexes Using a Cadmium-deposited Recessed Microelectrode and Confocal Fluorescence Microscope (2017)
  • Author(s): Kiyoharu Nakatani, Naoki Sawada, Tatsumi Sato
  • Journal Title: Analytical Sciences Volume: 33
  • NAID: 130006071193
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] 液滴を用いる電気化学 (2017)
  • Author(s): 中谷清治
  • Organizer: 日本分析化学会第77回分析化学討論会
  • Place of Presentation: 龍谷大学（京都府京都市）
  • Year and Date: 2017-05-27
  • Invited
• [Presentation] 微小電極‐共焦点顕微蛍光法による微小水滴／油系でのカドミウム５‐オクチルオキシメチル‐８‐キノリノール錯体抽出機構の解明 (2016)
  • Author(s): 澤田直輝，佐藤辰巳，中谷清治
  • Organizer: 日本分析化学会第65年会
  • Place of Presentation: 北海道大学（北海道札幌市）
  • Year and Date: 2016-09-16
• [Presentation] Kinetic analysis of chelate extraction at water microdroplet/oil interface by microelectrochemistry and confocal fluorescence microspectroscopy (2015)
  • Author(s): Naoki Sawada, Tatsumi Sato, Kiyoharu Nakatani
  • Organizer: 2015 International Chemical Congress of Pacific Basin Societies
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2015-12-16
  • Int'l Joint Research
• [Presentation] 微小電極-共焦点顕微蛍光法による微小水滴/油系キレート抽出速度解析法の開発 (2015)
  • Author(s): 澤田直輝，佐藤辰巳，中谷清治
  • Organizer: 日本分析化学会第75回分析化学討論会
  • Place of Presentation: 山梨大学(山梨県甲府市)
  • Year and Date: 2015-05-24
• [Presentation] 微小電極-共焦点顕微蛍光法による微小水滴/油系キレート抽出速度解析法の開発 (2015)
  • Author(s): 澤田 直輝，佐藤 辰巳，中谷 清治
  • Organizer: 日本分析化学会第75回分析化学討論会
  • Place of Presentation: 山梨大学（山梨県甲府市）
  • Year and Date: 2015-05-24
• [Remarks] 筑波大学化学域中谷研究室
  • URL: http://www.chem.tsukuba.ac.jp/nakatani/