title: Switching valves for use in multi-column gas chromatography.
abstract: Two switching valves for use in multi-column and frontal gas chromatography are described. Constructional and operational details are given and examples of use are quoted.
authors.affiliation: Chemistry Department University College of Swansea Singleton Park Swansea, U.K.
authors.forename: J R
authors.initials: JR
authors.lastname: Conder
authors.forename: J H
authors.initials: JH
authors.lastname: Purnell
authors.forename: R
authors.initials: R
authors.lastname: Walsh