M.A.J. van Opstal

Determination of glutathione in biological material by flow-injection analysis using an enzymatic recycling reaction

Frank A. Redegeld, M.A.J. van Opstal, E. Houdkamp et al. · Analytical Biochemistry · 1988 · 52 citations · Full text

Natural Sciences, Biochemistry, Biotechnology +7

Automated reversed-phase chromatographic analysis of etoposide and teniposide in plasma by using on-line surfactant-mediated sample clean-up and column-switching

M.A.J. van Opstal, F.A.L. van der Horst, J.J.M. Holthuis et al. · Journal of Chromatography B Biomedical Sciences and Applications · 1989 · 19 citations

Pharmacy, Pharmaceutical Analysis, Pharmacology +14

Determination of penicillin in pharmaceutical formulations by flow injection analysis using an optimised immobilised penicillinase reactor and iodometric detection

M.A.J. van Opstal, René Wolters, J.S. Blauw et al. · Journal of Pharmaceutical and Biomedical Analysis · 1990 · 19 citations

Pharmacy, Pharmaceutical Analysis, Pharmaceutics +7

Flow-injection system with photodiode array detection and multivariate data evaluation for quantifying teniposide in blood plasma

M. Gerritsen, G. Kateman, M.A.J. van Opstal et al. · Analytica Chimica Acta · 1990 · 14 citations

Pharmacy, Pharmaceutical Analysis, Pharmaceutics +10

On-line electrochemical derivatization combined with diode-array detection in flow-injection analysis

M.A.J. van Opstal, J.S. Blauw, J.J.M. Holthuis et al. · Analytica Chimica Acta · 1987 · 13 citations

Natural Sciences, Chemical Engineering, Chemistry +10