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Single pump on-line mixing system for capillary supercritical fluid chromatography

✍ Scribed by Hirata, Yukio ;Kawaguchi, Yukinori ;Funada, Yasuhiro ;Katoh, Seiki

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
407 KB
Volume
16
Category
Article
ISSN
0935-6304

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✦ Synopsis

Abstract

A simple inexpensive system comprising a piston pump, switching valves, and capillary tubing has been developed for preparing mixed mobile phases for capillary supercritical fluid chromatography. The system enables the on‐line preparation of mixed mobile phases without contamination of the pump with modifier. Modifier concentrations, which can be changed stepwise, were determined both experimentally and theoretically, the latter on the basis of density–viscosity relationships. Examples of both isobaric and pressure programmed separations are demonstrated.

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