J. Wijsbeek

发表

A single-column procedure on Bond Elut Certify for systematic toxicological analysis of drugs in plasma and urine.

X. H. Chen, J. Wijsbeek, J. Franke, 1992, Journal of forensic sciences.

Interference of alkanes in the gas chromatographic analysis of cannabis products

R. A. Zeeuw, J. Wijsbeek, T. Malingré, 1973, The Journal of pharmacy and pharmacology.

Isolation of acidic, neutral, and basic drugs from whole blood using a single mixed-mode solid-phase extraction column.

X. H. Chen, J. Wijsbeek, J. Franke, 1992, Journal of analytical toxicology.

Capillary gas chromatography on fused silica columns with splitless injection: the determination of phenobarbital in blood plasma

R. A. Zeeuw, J. Wijsbeek, J. Franke, 1983, Pharmaceutisch Weekblad.

Vapor-programmed preparative thin-layer chromatography, a technique with improved resolving power.

J. Wijsbeek, R. D. de Zeeuw, 1970, Analytical chemistry.

An enzymic digestion and solid-phase extraction procedure for the screening for acidic, neutral, and basic drugs in liver using gas chromatography for analysis.

X. H. Chen, J. Wijsbeek, J. Franke, 1996, Journal of analytical toxicology.

Separation and identification of thiobarbiturates by means of thin-layer chromatography.

J. Wijsbeek, R. D. de Zeeuw, 1969, Pharmaceutisch weekblad.

Cannabinoids with a Propyl Side Chain in Cannabis: Occurrence and Chromatographic Behavior

T. Vree, J. V. van Rossum, D. Breimer, 1972, Science.

Solid-phase extraction for the screening of acidic, neutral and basic drugs in plasma using a single-column procedure on Bond Elut Certify.

X. H. Chen, J. Wijsbeek, J. Franke, 1990, Journal of chromatography.

Impact of biological matrix, drug concentration, and method of isolation on detectability and variability of retention index values in gas chromatography.

M. Bogusz, J. Franke, J. Wijsbeek, 1985, Journal of analytical toxicology.

Applicability of Capillary Gas Chromatography to Substance Identification in Toxicology by Means of Retention Indices

R. A. Zeeuw, J. Franke, J. Wijsbeek, 1982 .

Isolation and determination of quaternary ammonium compounds by means of amberlite XAD-columns and thin layer chromatography

R. A. Zeeuw, J. Franke, J. Wijsbeek, 1978, Archives of Toxicology.

SPEC disc solid-phase extraction for rapid broad-spectrum drug screening in urine.

J. Wijsbeek, J. Franke, R. D. de Zeeuw, 2000, Journal of analytical toxicology.

BIOAVAILABILITY AFTER RECTAL ADMINISTRATION OF THIAZINAMIUM METHYLSULFATE IN DIFFERENT VEHICULES

J. Jonkman, J. Wijsbeek, R. Dezeeuw, 1979 .

CHEMICAL TRANSFORMATION TO AVOID INTERFERENCE IN THE ANALYSES OF DDT-TYPE COMPOUNDS AND POLYCHLORINATED-BIPHENYLS IN MEDICINAL-PLANTS

R. A. Zeeuw, J. Wijsbeek, R. Benecke, 1985 .

Multicenter evaluation of ultrafiltration, dialysis, and thermal coagulation as sample pretreatment methods for the colorimetric determination of paraquat in blood and tissues.

M. Bogusz, J. Wijsbeek, J. Franke, 1986, Journal of forensic sciences.

Pitfalls and solutions in the development of a fully automated solid-phase extraction method for drug screening purposes in plasma and whole blood.

J P Franke, R A de Zeeuw, K. Ensing, 1993, Journal of analytical toxicology.

Study of lot-to-lot reproducibilities of Bond Elut Certify and Clean Screen DAU mixed-mode solid-phase extraction columns in the extraction of drugs from whole blood.

X. H. Chen, J. Wijsbeek, J. Franke, 1993, Journal of chromatography.

Determination of carbisocaine, heptacaine and pentacaine in plasma by capillary gas chromatography with nitrogen-selective detection.

J. Wijsbeek, R. D. de Zeeuw, V. Marko, 1986, Journal of pharmaceutical and biomedical analysis.

Applicability of capillary gas chromatography to systematic toxicological analysis: occurrence of concentration-dependent retention behavior.

M. Bogusz, J. Wijsbeek, J. Franke, 1983, Journal of analytical toxicology.

Potentials of wide-bore fused silica capillary columns for substance identification by means of retention indices.

J. Wijsbeek, J. Franke, R. D. de Zeeuw, 1986, Journal of analytical toxicology.

Systematic analysis of solvents and other volatile substances by gas chromatography.

J. Franke, J. Wijsbeek, R. D. de Zeeuw, 1988, Journal of analytical toxicology.

INTERLABORATORY APPLICABILITY OF A RETENTION INDEX LIBRARY OF DRUGS FOR SCREENING BY REVERSED-PHASE HPLC IN SYSTEMATIC TOXICOLOGICAL ANALYSIS

Ra Dezeeuw, M Erkens, Maciej J. Bogusz, 1993 .

Interlaboratory Reproducibility of Retention Indices in Capillary Gas Chromatography

J. Wijsbeek, J. Franke, R. Dezeeuw, 1990 .

Determination of low concentrations of the quaternary ammonium compound thiazinamium methylsulphate in plasma and urine

R. A. Zeeuw, J. Jonkman, J. Wijsbeek, 1975 .

Metabolism and excretion of the quaternary ammonium compound thiazinamium methylsulfate (Multergan®) in man

R. A. Zeeuw, J. Jonkman, A. Soeterboek, 1982, Pharmaceutisch Weekblad.

Disposition of thiazinamium in humans after administration as an ion pair

R. A. Zeeuw, J. Jonkman, J. Wijsbeek, 1979, Pharmaceutisch weekblad.

First-pass effect after rectal administration of thiazinamium methylsulfate.

J. Jonkman, J. Wijsbeek, R. D. de Zeeuw, 1979, Journal of pharmaceutical sciences.

Determination of thiazinamium sulphoxide in urine by means of amberlite XAD-2 column chromatography and thin-layer densitometry.

J. Jonkman, J. Wijsbeek, R. D. de Zeeuw, 1976, Journal of chromatography.

Impact of biological matrix and isolation methods on detectability and interlaboratory variations of TLC Rf-values in systematic toxicological analysis.

M. Bogusz, J. Franke, J. Wijsbeek, 1984, Journal of Analytical Toxicology.

Influence of biological matrix on retention behaviour and identification possibilities of selected neutral and acidic drugs in thin layer chromatography. An interlaboratory investigation.

M. Bogusz, J. Wijsbeek, J. Franke, 1986, Journal of analytical toxicology.

Impact of urine matrix and isolation procedure on retention behaviour of basic drugs in thin-layer chromatography.

J. Franke, J. Wijsbeek, R. D. de Zeeuw, 1988, Journal of pharmaceutical and biomedical analysis.

Determination of basic drugs extracted from biological matrices by means of solid-phase extraction and wide-bore capillary gas chromatography with nitrogen-phosphorus detection.

X. H. Chen, J. Wijsbeek, J. Franke, 1994, Journal of analytical toxicology.

Semi-automated solid-phase extraction procedure for drug screening in biological fluids using the ASPEC system in combination with Clean Screen DAU columns.

K. Ensing, X. H. Chen, J. Wijsbeek, 1993, Journal of chromatography.

INVESTIGATION OF RESIDUES OF ORGANOCHLORINE COMPOUNDS IN VEGETABLE DRUGS .3. IDENTIFICATION OF RESIDUES OF POLYCHLORINATED-BIPHENYLS BY GAS-CHROMATOGRAPHY ON PACKED AND CAPILLARY COLUMNS AND BY GC/MS

J. Wijsbeek, J. Franke, A. Bruins, 1988 .

INVESTIGATION OF RESIDUES OF ORGANOCHLORINE COMPOUNDS IN VEGETABLE DRUGS .2. CONFIRMATION OF IDENTITY OF DDT-TYPE RESIDUES BY GAS-CHROMATOGRAPHY ON PACKED AND CAPILLARY COLUMN AND BY GC-MS

J. Wijsbeek, J. Franke, A. Bruins, 1986 .

Variations in the bioavailability of thiazinamium methylsulfate

J. Jonkman, J. Wijsbeek, R. D. de Zeeuw, 1977, Clinical pharmacology and therapeutics.