## Abstract A versatile and simple system is described that allows variation of the column flow rate in openβtubular capillary supercritical fluid chromatography using both onβcolumn and postcolumn detection. The system is based on columnβeffluent splitting in a lowβdeadβvolume T piece at the colum
Temperature and pressure controlled UV detector for capillary supercritical fluid chromatography
β Scribed by Yukio Hirata; Seiki Katoh
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 321 KB
- Volume
- 4
- Category
- Article
- ISSN
- 1040-7685
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β¦ Synopsis
Abstract
A method of controlling UV cell pressure was developed for capillary supercritical fluid chromatography. The cell pressure was kept constant even during pressure programming. This allowed the use of the UV detector at high sensitivities without baseβline drift. It could also be used as a refractive index detector. The detection limit for chrysene at 269 nm was 10 pg at S/N = 2.
π SIMILAR VOLUMES
## Abstract Packed capillary columns provide excellent separation of neutral lipids by supercritical fluid chromatography. For these separations, it is necessary to add a polar modifier to the mobile phase; hitherto, a detector suitable for quantitative analysis has been lacking. For this purpose,
The theoretical and practical implications of simultaneous temperature/pressure and synchronized density/temperature programming are considered. Examples are shown for separations of dimethylpolysiloxanes where these techniques provide superior separation over their analogous isothermal programming
## Abstract The eluotropic strength of several hydrofluorocarbon and perfluorocarbon supercritical fluids is examined using capillary supercritical fluid chromatography. The results obtained are compared with carbon dioxide, fluoroform, and carbon dioxide modified with 5% methanol. Various naphthal