Supercritical fluid chromatography–supersonic jet spectroscopy: II. Capillary column SFC with a sheath-flow nozzle
✍ Scribed by Steven R. Goates; Chung Hang Sin; John K. Simons; Karin E. Markides; Milton L. Lee
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 387 KB
- Volume
- 1
- Category
- Article
- ISSN
- 1040-7685
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✦ Synopsis
Supersonic jet spectroscopic detection has been successfully coupled to capillary supercritical fluid chromatography by introduction of the supercritical effluent into a secondary flow of argon, before supersonic expansion of the combined flow through a converging nozzle. At pressures of 6-10 atm, the flowing sheath of argon efficiently carries eluting sample through a 25-p,m nozzle orifice into the supersonic jet. Dead volumes are negligible in this arrangement, and high-resolution fluorescence excitation spectra are obtained. Perylene and benzo[a]pyrene were selectively detected in a standard reference coal tar sample at detection limits of 150 pg and 5 ng, respectively.