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Items: 1 to 20 of 172

1.

Combination of carbon isotope ratio with hydrogen isotope ratio determinations in sports drug testing.

Piper T, Emery C, Thomas A, Saugy M, Thevis M.

Anal Bioanal Chem. 2013 Jun;405(16):5455-66. doi: 10.1007/s00216-013-6949-3. Epub 2013 Apr 9.

PMID:
23568614
2.

Investigations on hydrogen isotope ratios of endogenous urinary steroids: reference-population-based thresholds and proof-of-concept.

Piper T, Thomas A, Thevis M, Saugy M.

Drug Test Anal. 2012 Sep;4(9):717-27. doi: 10.1002/dta.1416. Epub 2012 Sep 19.

PMID:
22991188
3.

Effect of changes in the deuterium content of drinking water on the hydrogen isotope ratio of urinary steroids in the context of sports drug testing.

Piper T, Degenhardt K, Federherr E, Thomas A, Thevis M, Saugy M.

Anal Bioanal Chem. 2013 Mar;405(9):2911-21. doi: 10.1007/s00216-012-6504-7. Epub 2012 Nov 6.

PMID:
23128907
4.

Influences of musk administration on the doping test.

He Y, Wang J, Liu X, Xu Y, He Z.

Steroids. 2013 Nov;78(11):1047-52. doi: 10.1016/j.steroids.2013.06.010. Epub 2013 Jul 23.

PMID:
23891647
5.

Urinary analysis of 16(5alpha)-androsten-3alpha-ol by gas chromatography/combustion/isotope ratio mass spectrometry: implications in anti-doping analysis.

Saudan C, Baume N, Mangin P, Saugy M.

J Chromatogr B Analyt Technol Biomed Life Sci. 2004 Oct 15;810(1):157-64.

PMID:
15358320
6.

Determination of 13C/12C ratios of endogenous urinary steroids: method validation, reference population and application to doping control purposes.

Piper T, Mareck U, Geyer H, Flenker U, Thevis M, Platen P, Schänzer W.

Rapid Commun Mass Spectrom. 2008 Jul;22(14):2161-75. doi: 10.1002/rcm.3601.

PMID:
18536069
7.

Steroid isotopic standards for gas chromatography-combustion isotope ratio mass spectrometry (GCC-IRMS).

Zhang Y, Tobias HJ, Brenna JT.

Steroids. 2009 Mar;74(3):369-78. doi: 10.1016/j.steroids.2008.10.001. Epub 2008 Oct 17.

PMID:
18992268
8.

Seized designer supplement named "1-Androsterone": identification as 3β-hydroxy-5α-androst-1-en-17-one and its urinary elimination.

Parr MK, Opfermann G, Geyer H, Westphal F, Sönnichsen FD, Zapp J, Kwiatkowska D, Schänzer W.

Steroids. 2011 May;76(6):540-7. doi: 10.1016/j.steroids.2011.02.001. Epub 2011 Feb 16.

PMID:
21310167
9.

Determination of (13)C/(12)C ratios of endogenous urinary steroids excreted as sulpho conjugates.

Piper T, Opfermann G, Thevis M, Schänzer W.

Rapid Commun Mass Spectrom. 2010 Nov 15;24(21):3171-81. doi: 10.1002/rcm.4762.

PMID:
20941765
10.

Degradation of urine samples and its influence on the ¹³C/¹²C ratios of excreted steroids.

Piper T, Geyer H, Schänzer W.

Drug Test Anal. 2010 Nov-Dec;2(11-12):620-9. doi: 10.1002/dta.219. Epub 2010 Nov 16.

PMID:
21204293
11.

Development of a GC/C/IRMS method--confirmation of a novel steroid profiling approach in doping control.

Van Renterghem P, Polet M, Brooker L, Van Gansbeke W, Van Eenoo P.

Steroids. 2012 Sep;77(11):1050-60. doi: 10.1016/j.steroids.2012.05.009. Epub 2012 Jun 20.

PMID:
22728892
12.

Determination of the deuterium/hydrogen ratio of endogenous urinary steroids for doping control purposes.

Piper T, Thevis M, Flenker U, Schänzer W.

Rapid Commun Mass Spectrom. 2009 Jul;23(13):1917-26. doi: 10.1002/rcm.4098.

PMID:
19462405
13.

Carbon isotope ratio mass spectrometry for detection of endogenous steroid use: a testing strategy.

Ahrens BD, Butch AW.

Drug Test Anal. 2013 Jul;5(7):534-40. doi: 10.1002/dta.1447. Epub 2013 Jan 10.

PMID:
23303562
14.

Factors influencing the steroid profile in doping control analysis.

Mareck U, Geyer H, Opfermann G, Thevis M, Schänzer W.

J Mass Spectrom. 2008 Jul;43(7):877-91. doi: 10.1002/jms.1457. Review.

PMID:
18570179
15.

Profiling of urinary steroids by gas chromatography-mass spectrometry detection and confirmation of androstenedione administration using isotope ratio mass spectrometry.

Wang J, Wu M, Liu X, Xu Y.

Steroids. 2011 Dec 20;76(14):1560-5. doi: 10.1016/j.steroids.2011.09.007. Epub 2011 Sep 17.

PMID:
21945895
16.

Screening urine for exogenous testosterone by isotope ratio mass spectrometric analysis of one pregnanediol and two androstanediols.

Aguilera R, Catlin DH, Becchi M, Phillips A, Wang C, Swerdloff RS, Pope HG, Hatton CK.

J Chromatogr B Biomed Sci Appl. 1999 Apr 30;727(1-2):95-105.

PMID:
10360427
17.

Drug testing data from the 2007 Pan American Games: delta13C values of urinary androsterone, etiocholanolone and androstanediols determined by GC/C/IRMS.

Aguilera R, Chapman TE, Pereira H, Oliveira GC, Illanes RP, Fernandes TF, Azevedo DA, Neto FA.

J Steroid Biochem Mol Biol. 2009 Jul;115(3-5):107-14. doi: 10.1016/j.jsbmb.2009.03.012. Epub 2009 Apr 14.

PMID:
19428237
18.

Investigations on changes in ¹³C/¹²C ratios of endogenous urinary steroids after pregnenolone administration.

Piper T, Schlug C, Mareck U, Schänzer W.

Drug Test Anal. 2011 May;3(5):283-90. doi: 10.1002/dta.281. Epub 2011 Apr 28.

PMID:
21538944
19.

Subject-based steroid profiling and the determination of novel biomarkers for DHT and DHEA misuse in sports.

Van Renterghem P, Van Eenoo P, Sottas PE, Saugy M, Delbeke F.

Drug Test Anal. 2010 Nov-Dec;2(11-12):582-8. doi: 10.1002/dta.206. Epub 2010 Dec 1.

PMID:
21204290
20.

Determination of 13C/12C ratios of urinary epitestosterone and its main metabolites 5alpha- and 5beta-androstane-3alpha, 17alpha-diol.

Piper T, Riemann P, Opfermann G, Mareck U, Geyer H, Vajiala G, Flenker U, Schänzer W.

Drug Test Anal. 2009 Nov;1(11-12):576-86. doi: 10.1002/dta.53.

PMID:
20355174

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