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Fiona Broughton Pipkin, Hiten D Mistry, Chandrima Roy, Bernhard Dick, Jason Waugh, Rebecca Chikhi, Lesia O Kurlak and Markus G Mohaupt

have used immunoassays which have the problem of steroid cross reactivity (20, 21) . We have addressed this problem by utilising gas chromatography-mass spectrometry (GC-MS) (22) . In addition, we have measured steroids in 24 h urine collections

Open access

Aneta Gawlik, Michael Shmoish, Michaela F Hartmann, Stefan A Wudy, Zbigniew Olczak, Katarzyna Gruszczynska and Ze’ev Hochberg

ultrasonography – L1 L , or both – L1 AL ) where defined as liver disease – L1 as compared to L0 – without markers of liver disease. Gas chromatography-mass spectrometry (GC-MS) of urinary steroids Steroid metabolites in 24-h urine samples were analyzed by

Open access

I Savchuk, M L Morvan, J P Antignac, K Gemzell-Danielsson, B Le Bizec, O Söder and K Svechnikov

Skakkebaek NE Juul A Le Bizec B. Assessment of circulating sex steroid levels in prepubertal and pubertal boys and girls by a novel ultrasensitive gas chromatography-tandem mass spectrometry method . Journal of Clinical Endocrinology and

Open access

L Ghataore, I Chakraborti, S J Aylwin, K-M Schulte, D Dworakowska, P Coskeran and N F Taylor

conjugates were hydrolysed enzymatically using Helix pomatia digestive juice. The free steroid products were then re-extracted and methyl oxime–trimethylsilyl ether (MO–TMS) derivatives were prepared before analysis by gas chromatography–mass spectrometry

Open access

Li Jing and Wang Chengji

.999%) was used as carrier gas with a constant linear velocity of 1.88 mL/min. 1.0 μL aliquot was injected in splitless mode. The temperature program that was optimized for GC was as follows: the initial oven temperature as 60°C, held for 3 min; 4°C/min to

Open access

Jean-Benoît Corcuff, Laurence Chardon, Ines El Hajji Ridah and Julie Brossaud

electrochemical detection ( 18 , 19 , 20 ). Recently, liquid chromatography coupled to mass spectrometry has been used for the detection and quantification of urinary as well as serum 5HIAA ( 21 , 22 , 23 ). Obviously, these last 5HIAA assays after HPLC

Open access

Paal Methlie, Steinar Hustad, Ralf Kellman, Bjørg Almås, Martina M Erichsen, Eystein S Husebye and Kristian Løvås

.1097/00007691-200408000-00011 ). 21 Taieb J Mathian B Millot F Patricot M-C Mathieu E Queyrel N Lacroix I Somma-Delpero C Boudou P . Testosterone measured by 10 immunoassays and by isotope-dilution gas chromatography–mass spectrometry in sera from 116 men, women

Open access

Sandra R Dahl, Ingrid Nermoen, Ingeborg Brønstad, Eystein S Husebye, Kristian Løvås and Per M Thorsby

Mathian B Millot F Patricot MC Mathieu E Queyrel N Lacroix I Somma-Delpero C Boudou P. Testosterone measured by 10 immunoassays and by isotope-dilution gas chromatography-mass spectrometry in sera from 116 men, women, and children . Clinical Chemistry

Open access

Federica Saponaro, Alessandro Saba, Sabina Frascarelli, Concetta Prontera, Aldo Clerico, Marco Scalese, Maria Rita Sessa, Filomena Cetani, Simona Borsari, Elena Pardi, Antonella Marvelli, Claudio Marcocci, Claudio Passino and Riccardo Zucchi

-linked immunoassays (ELISAs), radioimmunoassay (RIAs), chemiluminescence assays, high-performance liquid chromatography with UV detection (HPLC-UV), gas chromatography mass spectrometry and more recently liquid chromatography mass spectrometry (LC-MS-MS) ( 28

Open access

Jia Li, Yan Zhao, Caoxin Huang, Zheng Chen, Xiulin Shi, Long Li, Zhong Chen and Xuejun Li

), imaging mass spectrometry (IMS) ( 18 ) and other useful analytical tools such as nuclear magnetic resonance (NMR), liquid chromatography-mass spectrometry(LC-MS) and gas chromatography-mass spectrometry (GC-MS). This topic has not been studied previously