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Journal of Chromatography|September 3, 1975
Combined ultraviolet-fluorescence detection in high-pressure liquid chromatography of pharmaceuticalsW Lindner, R W Frei, W SantiJournal of Chromatography|November 3, 1976
Post-column fluorescence derivatization of peptides. Problems and potential in high-performance liquid chromatographyR W Frei, L Michel, W SantiJournal of Chromatography|May 21, 1975
The liquid chromatographic properties of phenothiazinesW Lindner, R W Frei, W SantiJournal of Chromatography|July 7, 1976
Rapid and sensitive high-resolution procedure for digitalis glycoside analysis by derivatization liquid chromatographyF Nachtmann, H Spitzy, R W FreiJournal of Chromatography|February 18, 1976
Fluorescence densitometric method for the determination of gluconic and lactobionic acids ("sugar acids") in pharmaceutical preparationsG Gübitz, R W Frei, H BethkeJournal of Chromatographic Science|August 1, 1976
Separation of drug substances by modern liquid chromatography on silver impregnated silica gelsR Aigner, H Spitzy, R W FreiJournal of Chromatography|June 23, 1976
Fluorogenic labeling of organophosphate pesticides with dansyl chloride. Application to residue analysis by high-pressure liquid chromatography and thin-layer chromatographyJ E Lawrence, C Renault, R W FreiJournal of Chromatography|August 11, 1989
Post-column reactors for sensitive and selective detection in high-performance liquid chromatography: categorization and applicationsU A Brinkman, R W Frei, H LingemanJournal of Chromatography|May 25, 1988
Stereoselective determination of L-amino acids using column liquid chromatography with an enzymatic solid-phase reactor and chemiluminescence detectionH Jansen, U A Brinkman, R W FreiJournal of Chromatography|December 24, 1975
High-speed ion-pair partition chromatography in pharmaceutical analysisW Santi, J M Huen, R W FreiPageof 13