Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/77489
Title: Some applications of Freon-22 in supercritical fluid chromatographic analysis of environmental pollutants
Authors: Yeo, S.K.
Ong, C.P. 
Lee, H.K. 
Li, S.F.Y. 
Issue Date: 1991
Source: Yeo, S.K.,Ong, C.P.,Lee, H.K.,Li, S.F.Y. (1991). Some applications of Freon-22 in supercritical fluid chromatographic analysis of environmental pollutants. Environmental Monitoring and Assessment 19 (1-3) : 47-53. ScholarBank@NUS Repository.
Abstract: The applications of Freon-22 (R22) as a mobile phase and as a modifier in supercritical fluid chromatography were investigated. For the purpose of this investigation, the separation of eleven phenols listed by the United States Environmental Protection Agency as priority pollutants was studied. It was found that the use of neat R22 greatly reduced the retention times of the phenols compared with the use of neat carbon dioxide as mobile phase. Satisfactory separation of all the eleven phenols could be achieved using 5% R22 as modifier in carbon dioxide. The promising results obtained in this preliminary investigation indicate the potential for the use of R22 in supercritical fluid separation processes.
Source Title: Environmental Monitoring and Assessment
URI: http://scholarbank.nus.edu.sg/handle/10635/77489
ISSN: 01676369
Appears in Collections:Staff Publications

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