Screening, confirmation and quantification of boldenone sulfate in equine urine after administration of boldenone undecylenate (Equipoise).

The research presents methods to detect, confirm and measure boldenone sulfate in horse urine after administering boldenone undecylenate, a usual practice to improve horse performance. This study shows that traces of the drug can be detected for up to 42 days after administration.

Methods and Procedures

• The research introduces the use of thin-layer chromatography as the first step in the process. This process helps to distinguish and separate various constituents of a mixture.
• The boldenone sulfate in the urine is then quantified through high-performance liquid chromatography with ultraviolet detection. High-performance liquid chromatography is an advanced form of column chromatography used in separating, identifying, and quantifying each component in a mixture. Likewise, ultraviolet detection aids in the detection of different elements based on their absorbance behavior in UV light.
• The quantified substance is then confirmed through gas chromatography-mass spectrometry. This is an advanced technique used in detecting and identifying specific substances within a test sample.

Sample Work-up Process

• In the conducted study, the sample work-up was done using C18 liquid-solid extraction, which is a powerful technique widely used in analytical laboratories for separation and purification of compounds.
• This process was then followed by the solvolytic cleavage of the sulfate ester, a process that breaks down the ester into two separate compounds.
• The drug was detectable in the equine urine as early as 2 hours to as long as 42 days after administered a therapeutic dose.

Quantification and Standardisation

• The research also discusses the use of 19-nortestosterone sulfate as the internal standard for quantification of boldenone sulfate. This is critical as it provides a reference point that ensures the quality of the results.
• The use of an internal standard allows for potential discrepancies and variations in the test process to be adjusted and thereby enable accurate quantification of the substance in the urine.