Concentration of Hydrophobic Solutes in Water on Teflon Film

聚四氟乙烯薄膜上水中疏水性溶质的浓度

• 批准号: 02804046
• 负责人: SANEMASA Isao
• 金额: $ 0.96万
• 依托单位: Kumamoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02804046/
• 关键词: Teflon; Hydrophobic solute; Solvent extraction; Concentration; Dithizone complex; PAN complex; Cyclodextrin; ポリエトラフルオロエチレン; 無電荷金属錯体; クロロホルム; 分配係数; テフロン(ポリテトラフルオロエチレン); テフロンフィルム皮膜有機溶媒層; 無電荷金属金属錯体; 芳香族炭化水素; クロロホルム蒸気

A noble method to concentrate hydrophobic solutes from water to Teflon (polytetrafluoroethylene) film surface has been studied. A test-tube containing 10 ml of an organic solvent (chloroform or benzene) and a cylindrical separatory funnel containing 500 ml of aqueous sample solution were connected together with a Viton diaphragm airpump. A PTEE-seal-tape (20 cm lpng, 1.3 cmwide, 0.1 mm thick) was placed on the water surface. The organic solvent vapor generated by bubbling air was dispersed through the sample solution via a sintered glass ball and circulated in the closed system. Then, the film was picked up and the solute held on it was eluted with a suitable organic solvent. As solutes, Fe (III)-8-hydroxyquinoline, dithizone complexes with Hg(II), Pb(II), Ag(I), and Cd(II), and PAN complexes with Co (II), Ni(II), Cd(II), and Zn(II) were used. Recoveries of these metal complexes by PTFE film were found to be more than 80%. The mechanism of the present concentration method is found to b … More e similar to that of conventional solvent extraction: chloroform molecules, being supplied continuously to the aqueous solution, cover the surface of the PTFE film to form a thin organic solvent layer which takes part in the partition of hydrophobic solutes. The thickness of the chloroform layer, which assumed to be formed on the surface of PTFE film upon circulating chloroform vapor in aqueous solution, was roughly estimated to be 10mum based on the recoveries of five free ligands of known chloroform/water partition constants.A technique was also proposed to prepare cyclodextrin(CyD) precipitates with volatile hydrocarbons. On introducing vapor of liquid or solid hydrocarbon into alpha-, beta-, or gamma-CyD in aqueous solution and circulating in a closed system, CyD can be easily precipitated. The CyD precipitates isolated from aqueous solution were analyzed to determine the hydrocarbon/CyD mole ratio. The technique has been applied to such hydrocarbons as n-alkanes(C_5 to C_<10>), cyclohexane, halobenzenes(fluoro-, chloro-, bromo-, and iodo-benzene), p-difluorobenzene, benzene, naphthalene, biphenyl, and diphenylmethane. Less

研究了一种将疏水性溶质从水中浓缩到聚四氟乙烯膜表面的方法。用氟橡胶隔膜气泵将装有10 ml有机溶剂（氯仿或苯）的试管和装有500 ml样品水溶液的圆柱形分液漏斗连接在一起。将PTEE密封带（20 cm lpng，1.3 cm宽，0.1 mm厚）放置在水面上。通过使空气鼓泡产生的有机溶剂蒸气经由烧结玻璃球分散到样品溶液中，并在封闭系统中循环。然后，拾取膜，用合适的有机溶剂洗脱保持在其上的溶质。作为溶质，使用Fe（III）-8-羟基喹啉、双硫腙与Hg（II）、Pb（II）、Ag（I）和Cd（II）的络合物以及PAN与Co（II）、Ni（II）、Cd（II）和Zn（II）的络合物。PTFE膜对这些金属络合物的回收率大于80%。本浓缩方法的机理为B ...更多信息 e类似于常规溶剂萃取：氯仿分子被连续供给到水溶液中，覆盖PTFE膜的表面以形成薄的有机溶剂层，该有机溶剂层参与疏水溶质的分配。根据已知氯仿/水分配常数的5个自由配体的回收率，推测在PTFE膜表面循环氯仿蒸气时形成的氯仿层厚度约为10 μ m，并提出了一种利用挥发性烃制备环糊精沉淀的方法.在将液态或固态烃的蒸气引入到水溶液中的α-、β-或γ-CyD中并在封闭系统中循环时，CyD可以容易地沉淀。分析从水溶液中分离的CyD沉淀物以确定烃/CyD摩尔比。该技术已应用于正构烷烃（C_5 ~ C_6<10>）、环己烷、卤代苯（氟苯、氯苯、溴苯和碘苯）、对二氟苯、苯、萘、联苯和二苯甲烷等烃类的分析。少

项目成果

Isao SANEMASA: "Coprecipitation of Aromatic Hydrocarbons from Water with beta-Cyclodextrin" Analytical Science. Vol.7,No.4. 641-643 (1991)

Isao SANEMASA：“用 β-环糊精从水中共沉淀芳香烃”分析科学。

実政 勲,栃原 拓夫,出口 俊雄: "クロロホルム蒸気通気による水溶液中の疎水性溶質のポリテトラフルオロエチレンフィルム表面への濃縮" 分析化学. 39. 239-244 (1990)

Isao Jitsemasa、Takuo Tochihara、Toshio Deguchi：“通过氯仿蒸气曝气将水溶液中的疏水性溶质浓缩到聚四氟乙烯薄膜的表面”分析化学 39. 239-244 (1990)。

実政 勲: "クロロホルム蒸気通気による水溶液中の疎水性溶質のポリテトラフルオロエチレンフィルム表面への濃縮" 分 析 化 学. 39. 239-244 (1990)

Isao Jitsemasa：“通过通气氯仿蒸气将水溶液中的疏水性溶质浓缩到聚四氟乙烯薄膜的表面”，《分析化学》39. 239-244 (1990)。

実政 勲: "Coprecipitation of Aromatic Hydrocarbons from Water with β-Cyclodextrin" Analytical Science. 7. 641-643 (1991)

Isao Jitsemasa：“用 β-环糊精从水中共沉淀芳香烃”《分析科学》7. 641-643 (1991)。

実政 勲: "Preparation of Cyclodextrin Precipitates with Volatile Hydrocarbons in Aqueous media,and Determination of Hydrocarbon/Cyclodextrin Molar Ratios in the Precipitates" Bulletin of the Chemical Society of Japan. 66. (1993)

Isao Jitsemasa：“在水介质中用挥发性烃制备环糊精沉淀物，以及沉淀物中烃/环糊精摩尔比的测定”日本化学会公报 66。（1993）。