Roland Walter Frei

Vrije Universiteit Amsterdam, Amsterdam, Netherlands 
Analytical chemistry
"Roland Frei"
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Michael M. Frodyma grad student 1965 University of Hawai'i
 (The determination of amino acids by spectral reflectance)
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Farjam A, Brugman AE, Soldaat A, et al. (1991) Immunoaffinity precolumn for selective sample pretreatment in column liquid chromatography: Immunoselective desorption Chromatographia. 31: 469-477
de Ruiter C, Brinkman JH, Frei RW, et al. (1990) Liquid chromatographic determination of pentachlorophenol in serum, using pre-column phase-transfer catalysed dansylation and post-column photolysis with fluorescence detection. The Analyst. 115: 1033-6
Irth H, de Jong GJ, Frei RW, et al. (1990) Determination of dithiocarbamates in residues by liquid chromatography with selective precolumn or reaction-detection systems International Journal of Environmental Analytical Chemistry. 39: 129-139
Irth H, Lamoree M, de Jong GJ, et al. (1990) Determination of d-myo-1,2,6-inositol trisphosphate by ion-pair reversed-phase liquid chromatography with post-column ligand exchange and fluorescence detection Journal of Chromatography A. 499: 617-625
Veltkamp AC, Das HA, Frei RW, et al. (1990) Flow-through radioactivity detection of 3H- and 14C-labelled compounds in reversed-phase liquid chromatography by a liquid scintillation counting technique based on post-column extraction Analytica Chimica Acta. 233: 181-189
Marko-Varga G, Dominguez E, Hahn-Hägerdal B, et al. (1990) On-line sample clean-up of fermentation broths and substrates prior to the liquid chromatographic separation of carbohydrates Journal of Chromatography A. 523: 173-188
Irth H, Tocklu R, Welten K, et al. (1989) Trace-level determination of 3'-azido-3'-deoxythymidine in human plasma by preconcentration on a silver (I)-thiol stationary phase with on-line reversed-phase high-performance liquid chromatography. Journal of Chromatography. 491: 321-30
Haasnoot W, Schilt R, Hamers AR, et al. (1989) Determination of beta-19-nortestosterone and its metabolite alpha-19-nortestosterone in biological samples at the sub parts per billion level by high-performance liquid chromatography with on-line immunoaffinity sample pretreatment. Journal of Chromatography. 489: 157-71
Debets AJ, Frei RW, Hupe KP, et al. (1989) Automated zone-electrophoretic sample treatment for the analysis of biological samples by high-performance liquid chromatography. Journal of Chromatography. 465: 315-23
Brinkman UA, Frei RW, Lingeman H. (1989) Post-column reactors for sensitive and selective detection in high-performance liquid chromatography: categorization and applications. Journal of Chromatography. 492: 251-98
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