Thin-layer chromatography under tropical conditions : impact of high temperatures and high humidities on screening systems for analytical toxicologyDE ZEEUW, R. A; FRANKE, J. P; VAN HALEM, M et al.Journal of chromatography. 1994, Vol 664, Num 2, pp 263-270, issn 0021-9673Article

Solid-phase extraction for the screening of acidic, neutral and basic drugs in plasma using a single-column procedure on Bond Elut CertifyXIAOHUA CHEN; WIJSBEEK, J; VAN VEEN, J et al.Journal of chromatography. Biomedical applications. 1990, Vol 529, Num 1, pp 161-166, issn 0378-4347Article

Erratic data in thin layer chromatography due to anomalous behavior of correction standardsBOGUSZ, M; BIALKA, J; DE ZEEUW, R. A et al.Journal of analytical toxicology. 1985, Vol 9, Num 3, pp 139-140, issn 0146-4760Article

Drug screening by capillary column gas chromatographyDE ZEEUW, R. A; BOGUSZ, M; FRANKE, J. P et al.Advances in analytical toxicology. 1984, Vol 1, pp 41-58, issn 0749-7431Article

Applicability of capillary gas chromatography to systematic toxicological analysis: occurrence of concentration-dependent retention behaviorBOGUSZ, M; WIJSBEEK, J; FRANKE, J. P et al.Journal of analytical toxicology. 1983, Vol 7, Num 4, pp 188-192, issn 0146-4760Article

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

Temperature effects on the chromatographic behaviour of racemic 2-amidotetralins on a whelk-o stationary phase in super- and subcritical fluid chromatographySELDITZ, U; COPINGA, S; GROL, C. J et al.Pharmazie. 1999, Vol 54, Num 3, pp 183-191, issn 0031-7144Article

Evaluation of the programmed temperature vaporiser for large-volume injection of biological samples in gas chromatographyVAN HOUT, M. W. J; DE ZEEUW, R. A; FRANKE, J. P et al.Journal of chromatography. B, Biomedical sciences and applications. 1999, Vol 729, Num 1-2, pp 199-210, issn 1387-2273Article

Impact of hot and humid tropical conditions on toxi-lab® thin-layer chromatographic systems for the screening of basic and neutral drugsDE ZEEUW, R. A; FRANKE, J. P; VAN HALEM, M et al.Journal of analytical toxicology. 1994, Vol 18, Num 7, pp 402-406, issn 0146-4760Article

Potential and pitfalls of chromatographic techniques and detection modes in substance identification for systematic toxicological analysisDE ZEEUW, R. A; HARTSTRA, J; FRANKE, J. P et al.Chromatography and electrophoresis in forensic analysis. Journal of chromatography. A. 1994, Vol 674, Num 1-2, pp 3-13Book Chapter

The potential of the X-Rite reflection spectrophotometer in systematic toxicological analysis by thin layer chromatographyKLUNGEL, O. H; ENSING, K; HEGGE, H. F. J et al.JPC. Journal of planar chromatography, modern TLC. 1993, Vol 6, Num 2, pp 112-116, issn 0933-4173Article

Interlaboratory survey of the quality of urinary arsenic and thallium assays in the European communityDE ZEEUW, R. A; FRANKE, J. P; STAMM, D et al.Journal of clinical chemistry and clinical biochemistry. 1987, Vol 25, Num 6, pp 351-355, issn 0340-076XArticle

Untersuchung pflanzlicher Drogen and Rückstände von Organochlorverbindungen. II: Identifizierung der Rückstände von DDT und seinen Analogen durch Vergleich von Gaschromatographie an gepackter und Kapillarsäule sowie GC/MS-Kopplung = Recherche sur les résidus de composés organochlorés dans les plantes médicinales. II. Confirmation de l'identité de résidus type DDT par chromatographie phase gazeuse, colonne capillaire et chromatographie phase gazeuse-spectrométrie masse = Investigation of residues of organochlorine compounds in vegetable drugs. II. Confirmation of identity of DDT type residues by gas chromatography on packed and capillary column and GC-MSBENECKE, R; BROTKA, J; WIJSBEEK, J et al.Pharmazie. 1986, Vol 41, Num 7, pp 499-501, issn 0031-7144Article

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