Structure elucidation of phase II metabolites by tandem mass spectrometry: an overview by Levsen, Karsten, Schiebel, Hans-Martin, Behnke, Beate, Dötzer, Reinhard, Dreher, Wolfgang, Elend, Manfred, Thiele, Herbert

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Development of a gas chromatography–mass spectrometry method for the determination of household insecticides in indoor air by Elflein, L, Berger-Preiss, E, Levsen, K, Wünsch, G

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Engine dynamometer experiments: platinum emissions from differently aged three-way catalytic converters by Artelt, S., Kock, H., König, H.P., Levsen, K., Rosner, G.

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Metabolism of verapamil: 24 new phase I and phase II metabolites identified in cell cultures of rat hepatocytes by liquid chromatography–tandem mass spectrometry by Walles, M, Thum, T, Levsen, K, Borlak, J

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Pesticides in rain by Hüskes, R., Levsen, K.

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Human biomonitoring of pyrethrum and pyrethroid insecticides used indoors:: Determination of the metabolites E- cis/ trans-chrysanthemumdicarboxylic acid in human urine by gas chro... by Elflein, L, Berger-Preiss, E, Preiss, A, Elend, M, Levsen, K, Wünsch, G

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Comparative studies of the leachate of an industrial landfill by gas chromatography–mass spectrometry, liquid chromatography–nuclear magnetic resonance and liquid chromatography–ma... by Benfenati, E, Pierucci, P, Fanelli, R, Preiss, A, Godejohann, M, Astratov, M, Levsen, K, Barceló, D

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Aromatic hydrocarbons in the atmospheric environment. Part III: personal monitoring by Ilgen, E., Levsen, K., Angerer, J., Schneider, P., Heinrich, J., Wichmann, H.-E.

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Verapamil: identification of novel metabolites in cultures of primary human hepatocytes and human urine by LC-MS(n) and LC-NMR by Borlak, J, Walles, M, Elend, M, Thum, T, Preiss, A, Levsen, K

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An Automatic Analyzer for Organic Compounds in Water Based on Solid-Phase Microextraction Coupled to Gas Chromatography by Grote, C, Levsen, K, Wünsch, G

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Two new asterosaponins from the starfish Asterias rubens: application of a cryogenic NMR probe head by Sandvoss, M., Preiss, A., Levsen, K., Weisemann, R., Spraul, M.

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Solid-phase microextraction coupled to gas chromatography: A new method for the analysis of organics in water by Eisert, Ralf, Levsen, Karsten

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Multidimensional on-line sample preparation of verapamil and its metabolites by a molecularly imprinted polymer coupled to liquid chromatography–mass spectrometry by Mullett, Wayne M, Walles, Markus, Levsen, Karsten, Borlak, Jürgen, Pawliszyn, Janusz

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Verapamil drug metabolism studies by automated in-tube solid phase microextraction by Walles, M, Mullett, W.M, Levsen, K, Borlak, J, Wünsch, G, Pawliszyn, J

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Indoor pollution by organic emissions from textile floor coverings: Climate test chamber studies under static conditions by Sollinger, S., Levsen, K., Wünsch, G.

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Human biomonitoring of pyrethrum and pyrethroid insecticides used indoors by Elflein, L, Berger-Preiss, E, Preiss, A, Elend, M, Levsen, K, Wünsch, G

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Bio-compatible in-tube solid-phase microextraction capillary for the direct extraction and high-performance liquid chromatographic determination of drugs in human serum by Mullett, Wayne M, Levsen, Karsten, Lubda, Dieter, Pawliszyn, Janusz

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Gas chromatographic and mass spectrometric determination of nitroaromatics in water by Feltes, J., Levsen, K., Volmer, D., Spiekermann, M.

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Aromatic hydrocarbons in the atmospheric environment: Part I. Indoor versus outdoor sources, the influence of traffic by Ilgen, Elke, Karfich, Natascha, Levsen, Karsten, Angerer, Jürgen, Schneider, Peter, Heinrich, Joachim, Wichmann, H.-Erich, Dunemann, Lothar, Begerow, Jutta

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Thermospray mass spectral studies of pesticides: Temperature and salt concentration effects on the ion abundances in thermospray mass spectra by Volmer, D., Preiss, A., Levsen, K., Wünsch, G.

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