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1

Analysis of individual natural pyrethrins in indoor matrices by HRGC/ECD

Edith Berger-Preiß, Karsten Levsen, Alfred Preiß

Journal:

Journal of Separation Science

Year:

1997

Language:

english

File:

PDF, 342 KB

english, 1997

2

Pyrethroids used indoor - ambient monitoring of pyrethroids following a pest control operation

Gabriele Leng, Edith Berger-Preiß, Karsten Levsen, Ulrich Ranft, Dorothee Sugiri, Wolfgang Hadnagy, Helga Idel

Journal:

International Journal of Hygiene and Environmental Health

Year:

2005

Language:

english

File:

PDF, 225 KB

english, 2005

3

Thermospray liquid chromatographic—mass spectrometric multi-residue determination of 128 polar pesticides in aqueous environmental samples

Dietrich Volmer, Karsten Levsen, Gerold Wünsch

Journal:

Journal of Chromatography A

Year:

1994

Language:

english

File:

PDF, 1013 KB

english, 1994

4

Analysis of Pesticides and Their Degradation Products in Rainwater: A Probe into Their Atmospheric Degradation

Jager, Maria E., Bourbon, Christine, Levsen, Karsten

Journal:

International Journal of Environmental & Analytical Chemistry

Year:

1998

Language:

english

File:

PDF, 962 KB

english, 1998

5

ChemInform Abstract: METASTABLE ION CHARACTERISTICS PART 26, STRUCTURE AND DECOMPOSITION OF THE C7H8(.+) ION FORMED BY GAMMA-HYDROGEN REARRANGEMENT

LEVSEN, KARSTEN, MCLAFFERTY, F. W., JERINA, DONALD M.

Journal:

Chemischer Informationsdienst

Year:

1973

File:

PDF, 101 KB

1973

6

Element-selective detection of pesticides by gas chromatography—atomic emission detection and solid-phase microextraction

Ralf Eisert, Karsten Levsen, Gerold Wünsch

Journal:

Journal of Chromatography A

Year:

1994

Language:

english

File:

PDF, 754 KB

english, 1994

7

Indoor pyrethroid exposure in homes with woollen textile floor coverings

Edith Berger-Preiß, Karsten Levsen, Gabriele Leng, Helga Idel, Dorothee Sugiri, Ulrich Ranft

Journal:

International Journal of Hygiene and Environmental Health

Year:

2002

Language:

english

File:

PDF, 302 KB

english, 2002

8

Determination of double bonds in alkenes by field ionization mass spectrometry

Levsen, Karsten., Weber, Raymund., Borchers, Friedrich., Heimbach, Heinz., Beckey, H. D.

Journal:

Analytical Chemistry

Year:

1978

Language:

english

File:

PDF, 416 KB

english, 1978

9

An improved automatic analyzer for organic compounds in water based on headspace solid-phase microextraction (SPME) coupled to gas chromatography

Eckhard Belau, Christoph Grote, Manfred Spiekermann, Karsten Levsen

Journal:

Field Analytical Chemistry & Technology

Year:

2001

Language:

english

File:

PDF, 3.72 MB

english, 2001

10

Bio-compatible in-tube solid-phase microextraction capillary for the direct extraction and high-performance liquid chromatographic determination of drugs in human serum

Wayne M Mullett, Karsten Levsen, Dieter Lubda, Janusz Pawliszyn

Journal:

Journal of Chromatography A

Year:

2002

Language:

english

File:

PDF, 375 KB

english, 2002

11

Automated In-Tube Solid-Phase Microextraction Coupled with HPLC for the Determination of N -Nitrosamines in Cell Cultures

Mullett, Wayne M., Levsen, Karsten, Borlak, Jürgen, Wu, Jingcun, Pawliszyn, Janusz

Journal:

Analytical Chemistry

Year:

2002

Language:

english

File:

PDF, 88 KB

english, 2002

12

Isomeric gaseous C2H4Cl+ ions

Monstrey, Joost, Van de Sande, Christian C., Levsen, Karsten, Heimbach, Heinz, Borchers, Friedrich

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1978

Language:

english

File:

PDF, 183 KB

english, 1978

13

Identification of nitrated polycyclic hydrocarbons in diesel particulate extracts by negative ion chemical ionization and tandem mass spectrometry

Jürgen Schilhabel, Karsten Levsen

Journal:

Analytical and Bioanalytical Chemistry

Year:

1989

Language:

english

File:

PDF, 453 KB

english, 1989

14

Identification of cationic and anionic surfactants in surface water by combined field desorption-collisionally activated decomposition mass spectrometry

Schneider, Erika., Levsen, Karsten., Boerboom, A. J. Henk., Kistemaker, Piet., McLuckey, Scott A., Przybylski, Michael.

Journal:

Analytical Chemistry

Year:

1984

Language:

english

File:

PDF, 240 KB

english, 1984

15

Collisional activation spectra. Gas phase [C12H10O]+˙ and [C12H9O]+ ions from dephenyl ether, diphenyl carbonate, and o-, m- and p-phenylphenol

Karsten Levsen, F. W. McLafferty

Journal:

Journal of Mass Spectrometry

Year:

1974

Language:

english

File:

PDF, 221 KB

english, 1974

16

MASSENSPEKTROMETRISCHE UNTERSUCHUNG ORGANISCHER STICKSTOFFVERBINDUNGEN XVIIIMECGABUSNEB;ndash DER NH3- ELIMINIERUNG AUS 3-PHENYL-PROPYL- UND 5-PHENYLPENTYLAMIN

Helmut Schwarz, Chrysostomos Wesdemiotis, Bernd Hess, Karsten Levsen

Journal:

Journal of Mass Spectrometry

Year:

1975

File:

PDF, 644 KB

1975

17

Short communication

Elvira Weger, Karsten Levsen, Jan Zwinselman, Alex G. Harrison

Journal:

International Journal of Mass Spectrometry and Ion Processes

Year:

1985

Language:

english

File:

PDF, 141 KB

english, 1985

18

Comparative study of different thermospray interfaces with carbamate pesticides: Influence of the ion source geometry

Dietrich Volmer, Karsten Levsen, Maarten Honing, Damia Barceló, Joaquín Abian, Emilio Gelpí, Ben L. M. van Baar, Udo A. Th. Brinkman

Journal:

Journal of the American Society for Mass Spectrometry

Year:

1995

Language:

english

File:

PDF, 1.11 MB

english, 1995

19

Isomerisierung von Kohlenwasserstoffionen, IV. Isomere C8H14+.- und C6H10+.-Ionen sowie ihre C7H11+-, C6H9+-, C6H7+- und C6H5+-Fragmente

Karsten Levsen, Ewald Hilt

Journal:

European Journal of Organic Chemistry

Year:

1976

Language:

german

File:

PDF, 599 KB

german, 1976

20

Gas-phase chemistry of collisionally activated ions

Karsten Levsen, Helmut Schwarz

Journal:

Mass Spectrometry Reviews

Year:

1983

Language:

english

File:

PDF, 3.72 MB

english, 1983

21

Solid-phase microextraction coupled to gas chromatography: A new method for the analysis of organics in water

Ralf Eisert, Karsten Levsen

Journal:

Journal of Chromatography A

Year:

1996

Language:

english

File:

PDF, 1018 KB

english, 1996

22

Development of a prototype system for quasi-continuous analysis of organic contaminants in surface or sewage water based on in-line coupling of solid-phase microextraction to gas chromatography

Ralf Eisert, Karsten Levsen

Journal:

Journal of Chromatography A

Year:

1996

Language:

english

File:

PDF, 434 KB

english, 1996

23

Identification of pollutants in ammunition hazardous waste sites by thermospray HPLC/MS

Michael Astratov, Alfred Preiβ, Karsten Levsen, Gerold Wünsch

Journal:

International Journal of Mass Spectrometry and Ion Processes

Year:

1997

Language:

english

File:

PDF, 1.17 MB

english, 1997

24

The Behaviour of Pyrethroids Indoors: A Model Study

Edith Berger-preieß, Alfred Preieß, Kriemhild Sielaff, Mechthild Raabe, Bert Ilgen, Karsten Levsen

Journal:

Year:

1997

Language:

english

File:

PDF, 1.21 MB

english, 1997

25

Stable gaseous aziridinium ions

Christian C. Van de Sande, Syed Zahoor Ahmad, Friedrich Borchers, Karsten Levsen

Journal:

Journal of Mass Spectrometry

Year:

1978

Language:

english

File:

PDF, 518 KB

english, 1978

26

Organic compounds in precipitation

Karsten Levsen, Sabine Behnert, Beate Prieß, Maria Svoboda, Hans-Dieter Winkeler, Joachim Zietlow

Journal:

Year:

1990

Language:

english

File:

PDF, 1.01 MB

english, 1990

27

Unimolecular equilibration of isomeric cation radicals. Mechanism of decomposition of ionized methyl isobutyrate in the gas phase

Hemberger, Philip H., Kleingeld, Jan C., Levsen, Karsten, Mainzer, Nili, Mandelbaum, Asher, Nibbering, Nico M. M., Schwarz, Helmut, Weber, Raymund, Weisz, Adrian, Wesdemiotis, Chrysostomos

Journal:

Journal of the American Chemical Society

Year:

1980

Language:

english

File:

PDF, 1.05 MB

english, 1980

28

Silyl-Assistierte Etherspaltung bei Radikalkationen von Hydroxylaminderivaten [1] / Silyl-Assisted Ether Cleavage in Radical Cations of Hydroxylamine Derivatives [1]

Ciommer, Bernhard, Schwarz, Helmut, Maaroufi, Azzedine, Reetz, Manfred T., Levsen, Karsten

Journal:

Zeitschrift für Naturforschung B

Year:

1981

Language:

german

File:

PDF, 3.09 MB

german, 1981

29

Stossinduzierte acetylen-eliminierung aus 13C-markier-tem hexadien-(1.3)-in-(5). Ein beitrag zur struktur langlebiger C6H6+--ionen

Claus Köppel, Helmut Schwarz, Friedrich Borchers, Karsten Levsen

Journal:

International Journal of Mass Spectrometry and Ion Physics

Year:

1976

File:

PDF, 475 KB

1976

30

Application of high-performance liquid chromatography coupled to nuclear magnetic resonance and high-performance liquid chromatography coupled to mass spectrometry to complex environmental samples

Karsten Levsen, Alfred Preiss, Markus Godejohann

Journal:

TrAC Trends in Analytical Chemistry

Year:

2000

Language:

english

File:

PDF, 1.02 MB

english, 2000

31

Schnelle vor-ort-analytik zur untersuchung von rüstungsaltlasten

Klaus-Michael Wollin, Karsten Levsen

Journal:

Environmental Sciences Europe

Year:

1999

File:

PDF, 1.45 MB

1999

32

Phenols and Nitrated Phenols in Clouds at Mount Brocken

Lüttke, Jens, Levsen, Karsten, Acker, Karin, Wieprecht, Wolfgang, Möller, Detlev

Journal:

International Journal of Environmental & Analytical Chemistry

Year:

1999

Language:

english

File:

PDF, 1.09 MB

english, 1999

33

ChemInform Abstract: METASTABLE ION CHARACTERISTICS PART 24. APPLICATION OF COLLISIONAL ACTIVATION SPECTRA TO THE ELUCIDATION OF ORGANIC ION STRUCTURES

MCLAFFERTY, F. W., KORNFELD, RICHARD, HADDON, W. F., LEVSEN, KARSTEN, SAKAI, IKUO, BENTE, P. F. III, TSAI, SHIH-CHUAN, SCHUDDEMAGE, H. D. R.

Journal:

Chemischer Informationsdienst

Year:

1973

File:

PDF, 131 KB

1973

34

ChemInform Abstract: Isolation and Structural Elucidation of Steroid Oligoglycosides from the Starfish Asterias rubens by Means of Direct Online LC-NMR-MS Hyphenation and One- and Two-Dimensional NMR Investigations.

Martin Sandvoss, Lam Huong Pham, Karsten Levsen, Alfred Preiss, Clemens Muegge, Gerold Wuensch

Journal:

Year:

2000

File:

PDF, 26 KB

2000

35

Liquid chromatography mass/spectrometry multiresidue determination of sulfonylureas after on-line trace enrichment

Dietrich Volmer, Jon G. Wilkes, Karsten Levsen

Journal:

Rapid Communications in Mass Spectrometry

Year:

1995

Language:

english

File:

PDF, 491 KB

english, 1995

36

On the formation of protonated acetic acid from ionized n-alkanoic acids in the gas phase

Herman Halim, Helmut Schwarz, John K. Terlouw, Karsten Levsen

Journal:

Journal of Mass Spectrometry

Year:

1983

Language:

english

File:

PDF, 230 KB

english, 1983

37

Organic compounds in precipitation

Karsten Levsen, Sabine Behnert, H. D. Winkeler

Journal:

Analytical and Bioanalytical Chemistry

Year:

1991

Language:

english

File:

PDF, 711 KB

english, 1991

38

Aromatic hydrocarbons in the atmospheric environment: Part I. Indoor versus outdoor sources, the influence of traffic

Elke Ilgen, Natascha Karfich, Karsten Levsen, Jürgen Angerer, Peter Schneider, Joachim Heinrich, H.-Erich Wichmann, Lothar Dunemann, Jutta Begerow

Journal:

Atmospheric Environment

Year:

2001

Language:

english

File:

PDF, 379 KB

english, 2001

39

Metastable ion characteristics. XXVI. Structure and decomposition of the C7H8.+ ion formed by .gamma.-hydrogen rearrangement

Levsen, Karsten., McLafferty, F. W., Jerina, Donald M.

Journal:

Journal of the American Chemical Society

Year:

1973

Language:

english

File:

PDF, 518 KB

english, 1973

40

Gaseous [C7H8]+˙ ions: [Methylene cyclohexadiene]+˙, a stable species in the gas phase

Peter C. Burgers, Johan K. Terlouw, Karsten Levsen

Journal:

Journal of Mass Spectrometry

Year:

1982

Language:

english

File:

PDF, 413 KB

english, 1982

41

Multidimensional on-line sample preparation of verapamil and its metabolites by a molecularly imprinted polymer coupled to liquid chromatography–mass spectrometry

Wayne M Mullett, Markus Walles, Karsten Levsen, Jürgen Borlak, Janusz Pawliszyn

Journal:

Journal of Chromatography B

Year:

2004

Language:

english

File:

PDF, 251 KB

english, 2004

42

Verapamil: new insight into the molecular mechanism of drug oxidation in the human heart

Markus Walles, Thomas Thum, Karsten Levsen, Jürgen Borlak

Journal:

Journal of Chromatography A

Year:

2002

Language:

english

File:

PDF, 795 KB

english, 2002

43

Aromatic hydrocarbons in the atmospheric environment – Part II: univariate and multivariate analysis and case studies of indoor concentrations

Elke Ilgen, Karsten Levsen, Jürgen Angerer, Peter Schneider, Joachim Heinrich, H.-Erich Wichmann

Journal:

Atmospheric Environment

Year:

2001

Language:

english

File:

PDF, 184 KB

english, 2001

44

Phase partitioning of phenol and nitrophenols in clouds

Jens Lüttke, Karsten Levsen

Journal:

Atmospheric Environment

Year:

1997

Language:

english

File:

PDF, 698 KB

english, 1997

45

Characterization of Dyes and Other Pollutants in the Effluent of a Textile Company by LC/NMR and LC/MS

Preiss, Alfred, Sänger, Ute, Karfich, Natascha, Levsen, Karsten, Mügge, Clemens

Journal:

Analytical Chemistry

Year:

2000

Language:

english

File:

PDF, 366 KB

english, 2000

46

Isomerization of hydrocarbon ions. VIII—The electron impact induced decomposition of n-dodecane

Karsten Levsen, Heinz Heimbach, G. John Shaw, G. W. A. Milne

Journal:

Journal of Mass Spectrometry

Year:

1977

Language:

english

File:

PDF, 721 KB

english, 1977

47

The study of the pyrolysis of alkyl nitrites in a field ionization mass spectrometer

Winfried Wagner, Karsten Levsen

Journal:

International Journal of Mass Spectrometry and Ion Physics

Year:

1981

Language:

english

File:

PDF, 1.22 MB

english, 1981

48

Mass spectrometric analysis of nitrogen- and phosphorus-containing pesticides by liquid chromatography-Mass Spectrometry

Dietrich Volmer, Levsen Karsten

Journal:

Journal of the American Society for Mass Spectrometry

Year:

1994

Language:

english

File:

PDF, 1.70 MB

english, 1994

49

Occurrence and formation of nitrated phenols in and out of cloud

Jens Lüttke, Volker Scheer, Karsten Levsen, Gerold Wünsch, J. Neil Cape, Ken J. Hargreaves, Robert L. Storeton-West, Karin Acker, Wolfgang Wieprecht, Brian Jones

Journal:

Atmospheric Environment

Year:

1997

Language:

english

File:

PDF, 1.34 MB

english, 1997

50

Collisional Activation Mass Spectrometry—A New Probe for Determining the Structure of Ions in the Gas Phase

Priv.-Doz. Dr. Karsten Levsen, Priv.-Doz. Dr. Helmut Schwarz

Journal:

Angewandte Chemie International Edition

Year:

1976

Language:

english

File:

PDF, 1.17 MB

english, 1976

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