title: The use of C18 bonded silica in the solid phase extraction of basic drugs - possible role for ionic interactions with residual silanols.
authors.affiliation: Department of Safety of Medicines, ICI Pharmaceuticals Division, Mereside, Alderley Park, Macclesfield, Cheshire, UK.
authors.forename: R J
authors.initials: RJ
authors.lastname: Ruane
authors.forename: I D
authors.initials: ID
authors.lastname: Wilson