Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Thermal Modulation Interface between Supercritical Fluid Extraction and Supercritical Fluid Chromatography.
Author Mitra, S. ; Wilson., N. K. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/219;
Stock Number PB91-117192
Additional Subjects Modulators ; Temperature ; Desorption ; Adsorption ; Laboratory equipment ; Extraction ; Supercritical flow ; Aromatic polycyclic hydrocarbons ; Reprints ; Supercritical fluid chromatography
Library Call Number Additional Info Location Last
NTIS  PB91-117192 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 03/04/1991
Collation 6p
A thermal modulator that can act as an interface between supercritical fluid extraction and supercritical fluid chromatography was developed and tested. The modulator was made of a short segment of a fused-silica capillary column, which was coated on the outside with electrically conductive paint so that it could be heated rapidly by a pulse of electric current. An equivalent of an injection is made internally within a flowing stream containing the sample by alternately heating and cooling the modulator, rather than by introduction through an injection port or a valve.