標題: Solubilization of hydrophilic compounds in 1,1,1,2-tetrafluoroethane with a cationic surfactant
作者: Li, JR
Lee, YM
Yu, T
應用化學系
Department of Applied Chemistry
公開日期: 15-三月-2000
摘要: Solubilization of hydrophilic compounds was examined in liquid 1,1,1,2-tetrafluoroethane (R134a) in the presence of the cationic surfactant trioctylmethylammonium chloride (TOMAC). The absorption spectra of methyl orange in the TOMAC-containing R134a solutions were obtained. Significant blue shifts were observed in comparison with the spectrum of methyl orange in aqueous solution. The shifts decreased as the water-to-surfactant ratio, Wb, increased. In addition, spectral measurements confirmed the dissolution of cytochrome c in R134a in the presence of TOMAC. R134a remains as a liquid under mild applied pressure and becomes gas under ambient conditions; it therefore separates from analytes of interest directly without further concentration when used as an extraction solvent. Accordingly, it may be applied to recover valuable hydrophilic substances of low concentration from aqueous solutions.
URI: http://dx.doi.org/10.1021/ac990972t
http://hdl.handle.net/11536/30655
ISSN: 0003-2700
DOI: 10.1021/ac990972t
期刊: ANALYTICAL CHEMISTRY
Volume: 72
Issue: 6
起始頁: 1348
結束頁: 1351
顯示於類別:期刊論文


文件中的檔案:

  1. 000085975200036.pdf

若為 zip 檔案,請下載檔案解壓縮後,用瀏覽器開啟資料夾中的 index.html 瀏覽全文。