H. Rotzsche, W. Engewald, J. Pörschmann: "Solid Stationary Phases" in: H. Rotzsche: "Stationary Phases in Gas Chromatography"; ELSEVIER Amsterdam (1991) 103-141 |
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W. Engewald, A. Steinborn: "Mehrsäulentechnik in der Kapillar-Gaschromatographie" in: H. Günzler, A.M. Bahadir, R. Borsdorf, K. Danzer, W. Fresenius, W. Huber, I. Lüderwald, G. Schwedt, G. Tölg, H. Wisser: "Analytiker-Taschenbuch Bd. 13"; Springer Berlin (1991) 83-110 |
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W. Engewald, T. Knobloch, T. Maurer: "Anwendung von Retentionsindices auf Systeme seriell gekoppelter GC-Säulen Teil I"; GIT Spezial Chromatographie 2 (1991) 102-105 |
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W. Engewald, T. Knobloch, T. Maurer: "Anwendung von Retentionsindices auf Systeme seriell gekoppelter GC-Säulen Teil II"; GIT Fachz.Lab. 9 (1991) 985-991 |
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W. Engewald: "Gaschromatographie"; Nachr. Chem. Tech. Lab. 42 (1994) 356-366 |
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| R. Nießner, J. A. C. Broekaert, K. Camman, J. W. Einax, H. Emons, H. Engelhardt, W. Engewald, K. G. Heumann, B. Hock, J. Kim, D. Kirstein, F. Scheller, R. Klockenkämper, M. Linscheid, K. Niemax, H. Nitsche, R. Salzer, F. Scholz, K. Stein, O. Wolfbeis: "Trendbericht Analytische Chemie"; Nachr. Chem. Tech. Lab. 46 (1998) 302-314 |
W. Engewald, J. Teske, J. Efer: "Programmed temperature vaporisers-based large volume injection in capillary gas chromatography"; J. Chromatogr. A 842 (1999) 143-161 |
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W. Engewald, J. Teske, J. Efer: "Programmed temperature vaporiser-based injection in capillary gas chromatography"; J. Chromatogr. A 856 (1999) 259-278 |
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R. Nießner, J. A. C. Broekaert, J. Einax, H. Emons, W. Engewald, K. Heumann, D. Kirstein, D. Knopp, R. Krska, U. Panne, U. Pyell, R. Salzer, F. Scheller, N. Trautmann, M. Weller: "Trendbericht: Analytische Chemie Spektroskopie"; Nachr. Chem. Tech. Lab. 48 (2000) 468-472 |
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W. Engewald: "20 Jahre GIT Spezial Separation"; GIT Spezial Separation 2 (2000) 65 |
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Hubert,
A.; Wenzel, K.-D.; Engewald, W.; Schüürmann, G. |
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Popp,
P.; Engewald, W.; Dettmer, K. |
W. Engewald, T. Knobloch, G. Haufe, M. Müller, V. Pohris: "A novel method for terpene pattern determination of essential oils by selectivity tuning in GC"; Fresenius J. Anal. Chem. 341 (1991) 641-643 |
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R. Meusinger, W. Engewald: "Struktur - Retentionsbeziehungen von stereoisomeren methylsubstituierten Isochromanen in der Gaschromatographie"; Journal f. prakt. Chemie. 333 (1991) 835-840 |
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W. Engewald, R. Reinhardt, G. Haufe: "Gaschromtographische Untersuchungen stereoisomerer Cyclotrideca-1,5,9-triene"; J.prakt.Chem.334 (1992) 41-48 |
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W. Engewald, R. Reinhardt, G. Haufe: "Isomerenidentifizierung - Kombinierter Einsatz von Kapillar-GC, GC-MS und GC-FTIR"; LaborPraxis 16 (1992) 634-640 |
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W. Engewald, R. Reinhardt, A. Steinborn, J. Rohloff, R. Herzschuh: "Gas Chromatrographic Behaviour of Isomeric Tricyclo [10.4.0.04.9] hexadecanes"; Chromatographia 34 (1992) 253-258 |
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P. Mußmann, A. Preiß, K. Levsen, G. Wünsch, J. Efer, W. Engewald: "Method Development for the Analysis of Pesticides on a Nitrophenol Basis"; Vom Wasser 79 (1992) 145-58 |
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Th. Knobloch, J. Efer, W. Engewald: "Adsorptive Anreicherung an Kohlenstoffadsorbentien und Thermodesorption" in : "Themen der Umweltanalytik, Tagungsband der SUPELCO Umwelttage 1992"; VCH Weinheim (1993) 103-110 |
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W. Engewald, R. Reinhardt, A. Steinborn: "The use of shape-selective stationary phases in GC Part 1: Cyclodextrin phases"; Pure & Appl. Chem. 65 (1993) 2253-2256 |
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Th. Knobloch, W. Engewald: "Identification of some Polar Polycyclic Compounds in Emissions from Brown-Coal-Fired Residential Stoves"; J. of High Res. Chromatogr. 16 (1993) 239-242 |
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J. Efer, S. Müller, W. Engewald, Th. Knobloch, K. Levsen: "Indirect GC Determination of Ethephon in Drinking Water by a Combination of Reactive Headspace Sampling with Adsorptive Enrichment/Thermal Desorption"; Chromatographia 37 (1993) 361-364 |
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S. Müller, J. Efer, L. Wennrich, W. Engewald, K. Levsen: "Gaschromatographische Spurenanalytik von Methamidophos und Buminafos im Trinkwasser - Einflußgrößen bei der PTV- Dosierung großer Probenvolumina"; Vom Wasser 81 (1993) 135-150 |
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W. Engewald, Th. Knobloch, J. Efer: "Flüchtige organische Verbindungen in Emissionen aus dem Hausbrand von Braunkohle"; UWSF - Z. Umweltchem. Ökotox. 5 (1993) 303-308 |
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P. Hennig, W. Engewald: "Influence of Adsorption Effects on Retention Indices of Selected C10-Hydroxy Compounds at Various Temperatures"; Chromatographia 38 (1994) 93-97 |
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L. Wennrich, J. Efer, S. Müller, W. Engewald: "Bestimmung von Trichlorfon in Trinkwasser mittels Festphasenextraktion und on-column-Kapillar-GC - Zu Problemen der Realprobenanalytik"; Vom Wasser 82 (1994) 281-288 |
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D. Volmer, K. Levsen, W. Engewald: "Analysis of polar Pesticides in Aqueous Samples by Combined On-line Trace Enrichment and Thermospray Liquid Chromatography-Mass Spectrometry"; Vom Wasser 82 (1994) 335-364 |
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P. Hennig, A. Steinborn, W. Engewald: "Investigation of the Composition of Pinus peuce Needle Oil by GC-MS and GC-GC-MS"; Chromatographia 38 (1994) 689-693 |
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S. Müller, J. Efer, W. Engewald: "Gas Chromatographic Water Analysis by Direct Injection of Large Sample Volumes in an Adsorbent-Packed PTV Injector"; Chromatographia 38 (1994) 694-700 |
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R. Reinhardt, W. Engewald, O. Goj, G. Haufe: "Enantiomer Separation of Side-chain Fluorinated Alkylbenzenes by Capillary Gas Chromatogaphy on Cyclodextrin Phases"; Chromatographia 39 (1994) 192-199 |
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U. Lewin, S. Müller, B. Schäfer, C. Struppe, J. Efer, W. Engewald: "Analytik von Rüstungsaltlasten"; LaborPraxis 18 (1994) 26-30 |
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B. Schäfer, W. Engewald: "Anreicherung nitroaromatischer Verbindungen aus Wasser mittels SPME"; GIT Spezial 14 (2/1994) 85-87 |
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R. Reinhardt, W. Engewald, U. Himmelreich, B. Christian, B. Koppenhoefer: "Enantiomer Separation of Cycloalkanols by Capillary Gas Chromatography on Cyclodextrin Phases"; Journal of Chromatographic Science 33 (1995) 236-243 |
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R. Reinhardt, W. Engewald, S. Görög: "Gas Chromatographic Separation of the Enantiomers of Flumecinol and Some Related Compounds"; J. High Resol. Chromatogr. 18 (1995) 259-262 |
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R. Reinhardt, A. Steinborn, W. Engewald, K. Anhalt, K. Schulze: "Enantiomer separation of -campholene and fencholene derivatives by capillary gas chromatography on permethylated cyclodextrin phases - I. Compounds separable with single columns"; J. Chromatogr. A 697 (1995) 475-484 |
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A. Steinborn, R. Reinhardt, W. Engewald, K. Wyssuwa, K. Schulze: "Enantiomer separation of -campholene and fencholene derivatives by capillary gas chromatography on permethylated cyclodextrins - II. Compounds separable with coupled techniques"; J. Chromatogr. A 697, (1995) 485-494 |
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B. Schäfer, W. Engewald: "Enrichment of nitrophenols from water by means of solid- phase microextraction"; Fresenius J. Anal. Chem. 352 (1995) 535-536 |
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J. Efer, S. Müller, W. Engewald: "Möglichkeiten der PTV-Technik für die gaschromatographische Trinkwasseranalytik"; GIT 39 (1995) 639-646 |
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L. Wennrich, J. Efer, W. Engewald: "Gas Chromatographic Trace Analysis of Underivatized Nitrophenols"; Chromatographia 41 (1995) 361-366 |
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B. Schäfer, P. Hennig, W. Engewald: "Analysis of Monoterpenes from Conifer Needles using Solid Phase Micro Extraction"; J. High Resol. Chromatogr. 18 (1995) 587-592 |
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Th. Knobloch, W. Engewald: "Sampling and Gas Chromatographic Analysis of Volatile Organic Compounds in Hot and Extremely Humid Emissions"; J. High Resol. Chromatogr. 19 (1996) 635-642 |
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U. Lewin, J. Efer, W. Engewald: "High-performance liquid chromatographic analysis with electrochemical detection for residues of explosives in water samples around a former ammunition plant"; J. Chromatogr. 730 (1996) 161-167 |
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L. Wennrich, U. Lewin, J. Efer, W. Engewald: "Analytik von Diamino- und Aminonitroaromaten in Wasser mittels Festphasenextraktion und HPLC" Vom Wasser 86 (1996) 341-352 |
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R. Reinhardt, M.Richter, P. P. Mager, P. Hennig, W. Engwald: "Investigation of Gas Chromatographic Interaction Mechanism on Permethylated Cyclodextrines by Molecular Modelling"; Chromatographia 43 (1996) 187-194 |
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S. Müller, J. Efer, W. Engewald: "Water pollution screening by large-volume injection of aqueous samples and application to GC/MS analysis of a river Elbe sample"; Fresenius J. Anal. Chem. 357 (1997) 558-560 |
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C. Struppe, B. Schäfer, W. Engewald: "Nitro Musk in Cosmetic Products - Determination by Headspase Solid-Phase Microextraction and Gas Chromatography with Atomic-Emission Detection"; Chromatographia 45 (1997) 138-144 |
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U. Lewin, L. Wennrich, J. Efer, W. Engewald: "Determination of Highly Polar Compounds in Water Samples around Former Ammunition Plants"; Chromatographia 45 (1997) 91-98 |
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B. Schäfer, P. Hennig, W. Engewald: "Methodological Aspects of Headspace SPME : Application of the Retention Index System"; J. High Resol. Chromatogr. 20 (1997) 217-221 |
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W. Engewald, Th. Knobloch, K. Dettmer, C. Struppe, J. Teske: "Gas Chromatographic Investigation of Carbonyl Compounds as DNPH-Derivatives"; GIT Spezial 4 (1997) 25-28 |
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L. Wennrich, W. Engewald, P. Popp: "Determination of Chloroethers in Aqueous Samples Using Solid-phase Microextraction"; Acta hydrochim. hydrobiol. 25 (1997) 329-334 |
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Th. Knobloch, A. Asperger, W. Engewald: "Volatile organic compounds in urban atmospheres: Long-term measurements of ambient air concentrations in differently loaded regions of Leipzig"; Fresenius J. Anal. Chem. 359 (1997) 189-197 |
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J. Efer, U. Ceglarek, Th. Anspach, W. Engewald, W. Pihan: "Atmosphärendruck-Ionisation-MS und GC/MS für die Klärwerksanalytik"; gwf-Wasser/Abwasser 11 (1997) 486-491 |
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J. Teske, J. Efer, W. Engewald: "Large-Volume PTV Injection: New Results on Direct Injection of Water Samples in GC Analysis"; Chromatographia 46 (1997) 579 |
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J. Teske, J. Efer, W.Engewald: "Large-Volume PTV Injection: Comparison of Direct Water Injection and In-Vial Extraction for GC Analysis of Triazines"; Chromatographia 47 (1998) 35 |
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A. Schreiber, J. Efer, U. Ceglarek, W. Engewald: " Identifizierung und Quantifizierung anionischer und nichtionischer Tenside"; GIT 42 (1998) 1050-1055 |
K. O. Wenzel, A. Hubert, M. Mauz, L. Weissflog, W. Engewald, G. Schürmann: "Accellerated Solvent Extraction of Semivolatile Organic Compounds from Biomonitoring Samples of Pine Needles and Mosses"; Analytical Chemistry 70 Vol. 22 (1998) 4827-4835 |
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A. Asperger, W. Engewald, T. Wagner: "Quantitative determination of acrylate-based coploymer retarding layers on drug granules using pyrolysis-gas chromatography"; J. Anal. Appl. Pyrolysis 49 (1999) 155-164 |
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A. Schreiber, J. Efer, W. Engewald: "Untersuchung zur Anwendbarkeit von Spektrenbibliotheken für die HPLC/MS"; GIT Spezial - Separation 1 (1999) 10-12 |
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A. Asperger, W. Engewald, G. Fabian: "Analytical characterisation of natural waxes employing pyrolysis-gas chromatography-mass spectrometry"; J. Anal. Appl. Pyrolysis 50 (1999) 103-115 |
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A. Asperger, W. Engewald, G. Fabian: "Advances in the analysis of natural waxes provided by thermally assisted hydrolysis and methylation in combination with GC/MS"; J. Anal. Appl. Pyrolysis 52 (1999) 51-63 |
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A. Schreiber, J. Efer, W. Engewald: "Identification and Quantification of Anionic and Nonionic Surfactants in Wastewater By Means of FIA-API-MS"; G.I.T. International Laboratory Journal 3 (1999) 192-196 |
L. Wennrich, W. Engewald, P. Popp: "GC trace analysis of haloethers in water - comparison of different extraction techniques"; Intern. J. Environ. Anal. Chem. 73(1) (1999) 31-41 |
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K.-D. Wenzel, A. Hubert, G. Schüürmann, W. Engewald: "ASE von POPs aus realen pflanzlichen Proben" GIT Spezial 2 (1999) 72-74 |
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A. Asperger, W. Engewald: "Schnelle Fingerprintanalyse natürlicher Wachse, Fette und Öle mittels THM in online-Kopplung mit GC/MS" GIT 7 (1999) 712-715 |
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U. Ceglarek, J. Efer, A. Schreiber, E. Zwanziger, W.Engewald: "Determination of linear alkylbenzenesulfonates in communal wastewaer by means of solid phase microextraction coupled with API-MS and HPLC-FLD" Fresenius J. Anal. Chem. 365 (1999) 674-683 |
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L. Didaoui, A. Touabet, B. Y. Meklati, U. Lewin-Kretzschmar, W. Engewald: "Comparison of retention indices of some explosives and related compounds calculated by different mathematical methods in reversed-phase liquid chromatography" J. High Resol. Chromatogr. 22 (1999) 613-618 |
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L. Didaoui, A. Touabet, A. Y. Badjah Hadj Ahmed, B. Y. Meklati, W. Engewald: "Evaluation of Dead Time Calculation in Reversed-Phase Liquid Chromatography Using a Multiparametric Mathematical Method"; J. High Resol. Chromatogr. 22 (1999) 559-564 |
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W. Engewald: "Der langsame Weg zur schnellen GC"; GIT 1/99 (1999) 1-4 |
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K.-D. Wenzel, A. Hubert, G. Schüürmann, W. Engewald: "ASE zur effizienteren Extraktion von POPs aus real kontaminierten Böden"; GIT Spezial Separation 1 (2000) 8-10 |
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K. Dettmer, Th. Knobloch, W. Engewald: "Stability of reactive low boiling hydrocarbons on carbon based adsorbents typically used for adsorptive enrichment and thermal desorption"; Fresenius J. Anal. Chem. 366 (2000) 70-78 |
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A. Schreiber, J. Efer, W. Engewald: "Application of spectral libraries for high-performance liquid chromatography-atmospheric pressure ionisation mass spectrometry to the analysis of pesticide and explosive residues in environmental samples" Chromatogr. A 869 (2000) 411-425 |
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A. Hubert, K.-D. Wenzel, M. Manz, L. Weissflog, W. Engewald, G. Schüürmann: "High Extraction Efficiency for POPs in Real Contaminated Soil Samples Using Accelerated Solvent Extraction"; Anal. Chem. 72 (2000) 1294-1300 |
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Th. Anspach, J. Efer, L. Wennrich, A. Schreiber, W. Engewald: "LC-MS für die Analytik halogenorganischer Verbindungen in gechlorten huminstoffreichen Wässern"; Vom Wasser 94 (2000) 11-28 |
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K. Dettmer, U. Felix, W. Engewald, M. Mohnke: "Application of a Unique Selective PLOT Capillary Column for the Analysis of Oxygenated Compounds in Ambient Air"; Chromatographia Supplement 51 (2000) 221-227 |
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Dettmer,
K.; Engewald, W. |
|
Ulrich, D.; Hoberg, E.; Bittner T.;
Engewald, W.; Meilchen, K. |
Asperger,
A.; Engewald, W.; Fabian, G. |
|
Asperger,
A.; Efer, J.; Koal, T.; Engewald, W.: "On the signal response of various pesticides
in electrospray and atmospheric pressure chemical ionization depending on the flow-rate of
eluent applied in liquid chromatography-tandem mass spectrometry"; Journal of
Chromatogr. A 937 (2001) 65-72 |
Drechsel,
D.; Dettmer, K.; Engewald, W.; Bittner, Th.; Efer, J.: " |
Dettmer, K.; Bittner,
Th.; Engewald, W. |