Laura Tretzel

Search results

• 2017

  Determination of the AdipoR agonists AdipoRon, 112254 and their metabolites in urine and dried blood spots in sports drug testing

  Dib, J., Tretzel, L., Piper, T., Schänzer, W. & Thevis, M., 2017, Recent advances in doping analysis: Proceedings of the Manfred Donike Workshop on Dope Analysis. Schänzer, W., Thevis, M., Geyer, H. & Mareck, U. (eds.). 2017 ed. Sportverlag Strauß, Vol. 25. p. 175 1 p.

  Publication: Chapter in Book/Report/Conference proceeding › Conference contribution - Published abstract for conference with selection process › Research › peer-review

• Screening for Adiponectin Receptor Agonists and their Metabolites in Urine and Dried Blood Spots

  Dib, J., Tretzel, L., Piper, T., Lagojda, A., Kuehne, D., Schänzer, W. & Thevis, M., 01.10.2017, In: Clinical mass spectrometry. 6, p. 13-20 8 p.

  Publication: Contribution to journal › Journal articles › Research › peer-review

  • Adiponectin 100%
  • Receptor Agonists 80%
  • Dried Blood Spot 40%
  • Screening 20%
  • Mitochondrial DNA 20%
• 2016

  Analyses of Meldonium (Mildronate) from Blood, Dried Blood Spots (DBS), and Urine Suggest Drug Incorporation into Erythrocytes

  Tretzel, L., Görgens, C., Geyer, H., Thomas, A., Dib, J., Guddat, S., Pop, V., Schänzer, W. & Thevis, M., 2016, In: International journal of sports medicine. 37, p. 500-502 3 p.

  Publication: Contribution to journal › Journal articles › Research › peer-review

• Analytics of nonpeptidic erythropoietin mimetic agents in sports drug testing employing high-resolution/high-accuracy liquid chromatography-mass spectrometry

  Vogel, M., Dib, J., Tretzel, L., Piper, T., Thomas, A., Schänzer, W. & Thevis, M., 09.2016, In: Analytical and bioanalytical chemistry. 408, 23, p. 6431-42 12 p.

  Publication: Contribution to journal › Journal articles › Research › peer-review

  • Erythropoietin 100%
  • Recombinant Erythropoietin 57%
  • Procedure 42%
  • Drug 42%
  • Doping 42%

• Anwendung von Dried Blood Spots (DBS) in der Dopinganalytik: eine innovative Probenmatrix für neue Kontrollstrategien in Training und Wettkampf

  Tretzel, L., 2016, Köln: Deutsche Sporthochschule Köln. 149 p.

  Publication: Book/Report › Dissertations

• Dried blood spots (DBS) in doping controls: a complementary matrix for improved in- and out- of-competition sports drug testing strategies

  Tretzel, L., Thomas, A., Geyer, H., Pop, V., Schänzer, W. & Thevis, M., 2016, Recent advances in doping analysis (24): Proceedings of the Manfred Donike Workshop on Dope Analysis. Schänzer, W., Thevis, M., Geyer, H. & Mareck, U. (eds.). Sportverlag Strauß, Vol. 24. p. 197 1 p.

  Publication: Chapter in Book/Report/Conference proceeding › Conference contribution - Published abstract for conference with selection process › Research › peer-review

• Fully automated determination of nicotine and its major metabolites in whole blood by means of a DBS online-SPE LC-HR-MS/MS approach for sports drug testing

  Tretzel, L., Thomas, A., Piper, T., Hedeland, M., Geyer, H., Schänzer, W. & Thevis, M., 2016, In: Journal of pharmaceutical and biomedical analysis. 123, 10, p. 132-140 9 p.

  Publication: Contribution to journal › Journal articles › Research › peer-review

  • Dried Blood Spot 100%
  • Nicotine 50%
  • Sample 50%
  • Sample Preparation 50%
  • Tandem Mass Spectrometry 37%

• Fully automated determination of nicotine and its major metabolites in whole blood by means of a DBS online-SPE LC-HR-MS/MS approach for sports drug testing

  Tretzel, L., Thomas, A., Piper, T., Hedeland, M., Geyer, H., Schänzer, W. & Thevis, M., 2016, Recent advances in doping analysis: Proceedings of the Manfred Donike Workshop in Dope Analysis. Schänzer, W., Thevis, M., H. G. & Mareck, U. (eds.). Sportverlag Strauß, Vol. 24. p. 150 1 p.

  Publication: Chapter in Book/Report/Conference proceeding › Conference contribution - Published abstract for conference with selection process › Research › peer-review

• Monitoring 2-phenylethanamine and 2-(3-hydroxyphenyl)acetamide sulfate in doping controls

  Dib, J., Sigmund, G., Tretzel, L., Piper, T., Schänzer, W. & Thevis, M., 2016, Recent advances in doping analysis : Proceedings of the Manfred Donike Workshop on Dope Analysis. Schänzer, W., Thevis, M., Geyer, H. & Mareck, U. (eds.). Sportverlag Strauß, Vol. 24. p. 183 1 p.

  Publication: Chapter in Book/Report/Conference proceeding › Conference contribution - Published abstract for conference with selection process › Research › peer-review

• Sports drug testing using complementary matrices: Advantages and limitations

  Thevis, M., Geyer, H., Tretzel, L. & Schänzer, W., 2016, In: Journal of pharmaceutical and biomedical analysis. 13, Oct., p. 220–230 11 p.

  Publication: Contribution to journal › Journal articles › Research › peer-review

  • Doping 100%
  • Procedure 37%
  • Serum 25%
  • Drug Screening 25%
  • Sample 25%
• 2015

  Detection of testosterone esters in blood

  Forsdahl, G., Erceg, D., Geisendorfer, T., Turkalj, M., Plavec, D., Thevis, M., Tretzel, L. & Gmeiner, G., 2015, In: Drug testing and analysis. 7, 11-12, p. 983-9 7 p.

  Publication: Contribution to journal › Journal articles › Research › peer-review

  • Testosterone 100%
  • Testosterone Ester 38%
  • Ester 23%
  • Blood Sampling 15%
  • Liquid Chromatography Tandem Mass Spectrometry 15%

• Detection of testosterone esters in blood samples

  Gmeiner, G., Forsdahl, G., Tretzel, L., Thevis, M., Geisendorfer, T. & Erceg, D., 2015, Recent advances in doping analysis (23). Sportverlag Strauß, Vol. 23. p. 241

  Publication: Chapter in Book/Report/Conference proceeding › Conference contribution - Published abstract for conference with selection process › Research

• Determination of Synacthen(®) in dried blood spots for doping control analysis using liquid chromatography tandem mass spectrometry

  Tretzel, L., Thomas, A., Geyer, H., Delahaut, P., Schänzer, W. & Thevis, M., 12.04.2015, In: Analytical and bioanalytical chemistry.

  Publication: Contribution to journal › Journal articles › Research › peer-review

  • Dried Blood Spot 100%
  • Sample 50%
  • Tetracosactide 33%
  • Liquid Chromatography Tandem Mass Spectrometry 33%
  • Development 33%

• Determination of Synacthen® in Dried Blood Spots for doping control analysis using liquid chromatography tandem mass spectrometry

  Tretzel, L., Thomas, A., Geyer, H., Delahaut, P., Schänzer, W. & Thevis, M., 2015, Recent advances in doping analysis (23). Schänzer, W., Thevis, M., Geyer, H. & Mareck, U. (eds.). Sportverlag Strauß, Vol. 23. p. 233 1 p.

  Publication: Chapter in Book/Report/Conference proceeding › Conference contribution - Published abstract for conference with selection process › Research

• Dried blood spots (DBS) in doping controls: a complementary matrix for improved in- and out-of-competition sports drug testing strategies

  Tretzel, L., Thomas, A., Geyer, H., Pop, V., Schanzer, W. & Thevis, M., 2015, In: Anal. Methods. 7, p. 7596-7605 10 p.

  Publication: Contribution to journal › Journal articles › Research › peer-review

  • Dried Blood Spot 100%
  • Procedure 40%
  • Doping 40%
  • Liquid Chromatography 20%
  • Anabolic Agent 20%

• Expanded test method for peptides >2 kDa employing immunoaffinity purification and LC-HRMS/MS

  Thomas, A., Walpurgis, K., Tretzel, L., Brinkkötter, P., Fichant, E., Delahaut, P., Schänzer, W. & Thevis, M., 18.09.2015, In: Drug testing and analysis.

  Publication: Contribution to journal › Journal articles › Research › peer-review

  • Procedure 100%
  • Insulin Derivative 42%
  • Peptide 42%
  • Sample 42%
  • Purification 28%

• Formation of the diuretic chlorazanil from the antimalarial drug proguanil-Implications for sports drug testing

  Thevis, M., Geyer, H., Thomas, A., Tretzel, L., Bailloux, I., Buisson, C., Lasne, F., Schaefer, M. S., Kienbaum, P., Mueller-Stoever, I. & Schänzer, W., 22.07.2015, In: Journal of pharmaceutical and biomedical analysis. 115, p. 208-213 6 p.

  Publication: Contribution to journal › Journal articles › Research › peer-review

  • Proguanil 100%
  • Biguanide 50%
  • Diuretic Agent 37%
  • Antimalarial Agent 37%
  • Doping 37%

• Improvement of the stability of Synacthen® in Dried Blood Spots by means of heat stabilization

  Tretzel, L., Thomas, A., Sköld, K., Zeeberg, D., Schänzer, W. & Thevis, M., 2015, Recent advances in doping analysis (23). Schänzer, W., Thevis, M., Geyer, H. & Mareck, U. (eds.). Sportverlag Strauß, Vol. 23. p. 126-129 1 p.

  Publication: Chapter in Book/Report/Conference proceeding › Conference contribution - Article for conference › Research

• Monitoring 2-phenylethanamine and 2-(3-hydroxyphenyl)acetamide sulfate in doping controls

  Sigmund, G., Dib, J., Tretzel, L., Piper, T., Bosse, C., Schänzer, W. & Thevis, M., 20.10.2015, In: Drug testing and analysis.

  Publication: Contribution to journal › Journal articles › Research › peer-review

  • Phenethylamine 100%
  • Sample 31%
  • Concentration 31%
  • M1 31%
  • Doping 26%

• Urinary phenylethylamine in sports drug testing

  Tretzel, L., Sigmund, G., Piper, T., Schänzer, W. & Thevis, M., 2015, Recent advances in doping analysis (23). Schänzer, W., Thevis, M., Geyer, H. & Mareck, U. (eds.). Sportverlag Strauß, Vol. 23. p. 270 1 p.

  Publication: Chapter in Book/Report/Conference proceeding › Conference contribution - Published abstract for conference with selection process › Research
• 2014

  Use of dried blood spots in doping control analysis of anabolic steroid esters

  Tretzel, L., Thomas, A., Geyer, H., Gmeiner, G., Forsdahl, G., Pop, V., Schänzer, W. & Thevis, M., 05.08.2014, In: Journal of pharmaceutical and biomedical analysis. 96, p. 21-30 10 p.

  Publication: Contribution to journal › Journal articles › Research

  • Testosterone 100%
  • Dried Blood Spot 71%
  • Steroid 42%
  • Sampling 28%
  • Electric Potential 14%

• Use of dried blood spots in doping control analysis of anabolic steroid esters

  Tretzel, L., Thomas, A., Geyer, H., Gmeiner, G., Forsdahl, G., Pop, V., Schänzer, W. & Thevis, M., 2014, Recent advances in doping analysis (22). Schänzer W, Thevis M, Geyer H, Mareck U (ed.). Sportverlag Strauß, Vol. 22. p. 224 1 p.

  Publication: Chapter in Book/Report/Conference proceeding › Conference contribution - Published abstract for conference with selection process › Research › peer-review