New practical algorithm for modelling retention times in gradient reversed-phase high-performance liquid chromatographyHENDRIKS, G; FRANKE, J. P; UGES, D. R. A et al.Journal of chromatography. 2005, Vol 1089, Num 1-2, pp 193-202, issn 0021-9673, 10 p.Article

SPEC® disc solid-phase extraction for rapid broad-spectrum drug screening in urineDE ZEEUW, R. A; WIJSBEEK, J; FRANKE, J. P et al.Journal of analytical toxicology. 2000, Vol 24, Num 2, pp 97-101, issn 0146-4760Article

Multiresidue analysis of β₂-agonists in human and calf urine using multimodal solid-phase extraction and high-performance liquid chromatography with electrochemical detectionKOOLE, A; BOSMAN, J; FRANKE, J. P et al.Journal of chromatography. B, Biomedical sciences and applications. 1999, Vol 726, Num 1-2, pp 149-156, issn 1387-2273Article

Interlaboratory applicability of a retention index library of drugs for screening by reversed phase HPLC in systematic toxicological analysisBOGUSZ, M; ERKENS, M; FRANKE, J. P et al.Journal of liquid chromatography. 1993, Vol 16, Num 6, pp 1341-1354, issn 0148-3919Article

Evaluation of dead time calculation in liquid chromatography using a linearization procedure for homologous seriesVAN TULDER, P. J. M; FRANKE, J. P; DE ZEEUW, R. A et al.HRC & CC. Journal of high resolution chromatography & chromatography communications. 1987, Vol 10, Num 4, pp 191-200, issn 0344-7138Article

Influence of biological matrix on retention behaviour and identification possibilities of selected neutral and acidic drugs in thin layer chromatography: an interlaboratory investigationBOGUSZ, M; FRANKE, J. P; WIJSBEEK, J et al.Journal of analytical toxicology. 1986, Vol 10, Num 6, pp 245-249, issn 0146-4760Article

Impact of biological matrix and isolation methods on detectability and interlaboratory variations of TLC Rf-values in systematic toxicological analysisBOGUSZ, M; KLYS, M; WIJSBEEK, J et al.Journal of analytical toxicology. 1984, Vol 8, Num 4, pp 149-154, issn 0146-4760Article

PH adjustment of human blood plasma prior to bioanalytical sample preparationHENDRIKS, G; UGES, D. R. A; FRANKE, J. P et al.Journal of pharmaceutical and biomedical analysis. 2008, Vol 47, Num 1, pp 126-133, issn 0731-7085, 8 p.Article

Reconsideration of sample pH adjustment in bioanalytical liquid-liquid extraction of ionisable compoundsHENDRIKS, G; UGES, D. R. A; FRANKE, J. P et al.Journal of chromatography. B. 2007, Vol 853, Num 1-2, pp 234-241, issn 1570-0232, 8 p.Article

Dynamically coated capillaries improve the identification power of capillary zone electrophoresis for basic drugs in toxicological analysisBOONE, C. M; JONKERS, E. Z; FRANKE, J. P et al.Journal of chromatography. 2001, Vol 927, Num 1-2, pp 203-210, issn 0021-9673Article

How to approach substance identification in qualitative bioanalysisHARTSTRA, J; FRANKE, J. P; DE ZEEUW, R. A et al.Journal of chromatography. B, Biomedical sciences and applications. 2000, Vol 739, Num 1, pp 125-137, issn 1387-2273Conference Paper

Preliminary evaluation of the asted XL dialysis system towards its applicability in ligand binding assaysHUANG, Z; JANSSEN, M. J; PAULUSSEN, R. J. A et al.Analytical letters. 1995, Vol 28, Num 15, pp 2635-2651, issn 0003-2719Article

An overview on the standardization of chromatographic methods for screening analysis in toxicology by means of retention indices and secondary standards. I: Gas chromatographyFRANKE, J. P; BOGUSZ, M; DE ZEEUW, R. A et al.Fresenius' journal of analytical chemistry. 1993, Vol 347, Num 3-4, pp 67-72, issn 0937-0633Article

Untersuchung pflanzlicher Drogen auf Rückstände von Organochlorverbindungen. III: Identifizierung von Rückständen polychlorierter Biphenyle durch Vergleich von Gaschromatographie an gepackter und Kapillarsäule sowie GC/MS-Kopplung = Etude des résidus d'organochlorés dans les plantes médicinales. III: Identification des résidus de biphényles polychlorés par chromatographie en phase gazeuse en colonne compacte et capillaire et par CG/SM = Investigation of residues of organochlorine compounds in vegetable drugs. III: Identification of residues of polychlorinated biphenyls by gas chromatography on packed and capillary columns and by GC/MSBENECKE, R; BROTKA, J; WIJSBEEK, J et al.Pharmazie. 1988, Vol 43, Num 2, pp 123-125, issn 0031-7144Article

System evaluation and substance identification in systematic toxicological analysis by the mean list length approachSCHEPERS, P. G. A. M; FRANKE, J. P; DE ZEEUW, R. A et al.Journal of analytical toxicology. 1983, Vol 7, Num 6, pp 272-278, issn 0146-4760Article

New practical algorithm for modelling analyte recovery in bioanalytical reversed phase and mixed-mode solid phase extractionHENDRIKS, G; UGES, D. R. A; FRANKE, J. P et al.Journal of pharmaceutical and biomedical analysis. 2008, Vol 48, Num 1, pp 158-170, issn 0731-7085, 13 p.Article

Feasibility of the direct coupling of solid-phase extraction-pipette tips with a programmed-temperature vaporiser for gas chromatographic analysis of drugs in plasmaVAN HOUT, M. W. J; VAN EGMOND, W. M. A; FRANKE, J. P et al.Journal of chromatography. B, Biomedical sciences and applications. 2002, Vol 766, Num 1, pp 37-45, issn 1387-2273Article

Solid phase extraction for multi-residue analysis of anabolic steroids and related substances from calf urine using C18 and alumina columnsKOOLE, A; FRANKE, J. P; DE ZEEUW, R. A et al.Journal of liquid chromatography & related technologies. 1999, Vol 22, Num 17, pp 2627-2650, issn 1082-6076Article

Direct enantiomeric separation of mianserin and 6-azamianserin derivatives using chiral stationary phasesSELDITZ, U; YI LIAO; FRANKE, J. P et al.Journal of chromatography. 1998, Vol 803, Num 1-2, pp 169-177, issn 0021-9673Article

Dramatic signal reduction in ion-mobility spectrometry by residues of solventsKOOLE, A; LUO, Y; FRANKE, J. P et al.Journal of analytical toxicology. 1998, Vol 22, Num 3, pp 191-196, issn 0146-4760Article

Application of radioreceptor assays for systematic toxicological analysis. I : Procedures for radioreceptor assays for antihistaminics, anticholinergics and benzodiazepinesENSING, K; BOSMAN, I. J; EGBERTS, A. C. G et al.Journal of pharmaceutical and biomedical analysis. 1994, Vol 12, Num 1, pp 53-58, issn 0731-7085Article

Comparison between cellulose and amylose tris(3,5-dimethylphenylcarbamate) chiral stationary phases for enantiomeric separation of 1 amidotetralinsWITTE, D. T; BRUGGEMAN, F. J; FRANKE, J. P et al.Chirality (New-York, NY). 1993, Vol 5, Num 7, pp 545-553, issn 0899-0042Article

Impact of urine matrix and isolation procedure on retention behaviour of basic drugs in thin-layer chromatographyFRANKE, J. P; DE ZEEUW, R. A; WIJBEEK, J et al.Journal of pharmaceutical and biomedical analysis. 1988, Vol 6, Num 4, pp 415-420, issn 0731-7085Article

Potentials of wide-bore fused silica capillary columns for substance identification by means of retention indicesFRANKE, J. P; DE ZEEUW, R. A; WIJSBEEK, J et al.Journal of analytical toxicology. 1986, Vol 10, Num 4, pp 132-134, issn 0146-4760Article

Solid-phase extraction - thermal desorption - gas chromatography with mass selective detection for the determination of drugs in urineVON HOUT, M. W. J; DE ZEEUW, R. A; FRANKE, J. P et al.Chromatographia (Wiesbaden). 2003, Vol 57, Num 3-4, pp 221-225, issn 0009-5893, 5 p.Article