DEVELOPMENT OF A TECHNIQUE FOR THE MASS-SPECTROMETRIC DETERMINATION OF GONADOTROPIN-RELEASING HORMONE AND ITS ANALOGS FOR DOPING CONTROL

Abstract

In the present study, a rapid, sensitive, and selective method for determination of several synthetic analogues of gonadotropin-releasing hormone in human urine by solid-phase extraction and ultraperformance liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS) was developed. Various parameters affecting sample preparation, LC separation, and MS/MS detection were investigated, and optimized conditions were identified. The UPLC-MS/MS system was equipped with an electrospray ion source operating in positive ion mode with selected reaction monitoring. Leuprolide-13С6 was used as internal standard for analytes quantitative assessment. The proposed method was validated considering the parameters specificity, linearity (0.1-10 ng/ml), recovery (52-98%), limit of detection (0.1 ng/ml), matrix effects and stability.

Keywords

• gonadotropin-releasing hormone
• gonadotropin-releasing hormone agonists
• solidphase egonadotropin-releasing hormon
• gonadotropin-releasing hormon agonists
• solid-phase extraction
• ultra-performance liquid chromatography coupled to tandem mass spectrometry
• uplcms/ms
• ultra-performance liquid chromatography coupled to high resolution mass spectrometry
• uplc-hrms
• doping control