The use of combined high performance liquid chromatography negative ion chemical ionization mass spectrometry to confirm the administration of synthetic corticosteroids to horses.

The research article discusses the application of a specific analytical technique, high performance liquid chromatography negative ion chemical ionization mass spectrometry, in confirming the administration of synthetic corticosteroids to horses.

Overview of the Research

In this article, the researchers have outlined an investigation into the usage of high-performance liquid chromatography combined with negative ion chemical ionization mass spectrometry (HPLC-NICIMS) as a reliable method to verify the administration of synthetic corticosteroids in horses. Synthetic corticosteroids such as dexamethasone, betamethasone, and prednisolone were given to the horses at therapeutic doses.

• The negative ion chemical ionization mass spectra of the mentioned corticosteroids were obtained by introducing them directly onto the Finnigan moving belt, a high-performance liquid chromatography-mass spectrometer interface.
• Following administration, urine samples were taken from the horses, from which extracts were derived and purified using Sephadex LH-20 chromatography.
• The researchers then used the HPLC-NICIMS method to identify the parent steroids in the purified extracts. For the chemical ionization process, ammonia was used as the reagent gas.

Significance of the Research

This research contributes significantly to the field of veterinary medicine and sports science where doping control is critical.

• The method discussed uses an advanced analytical technique which combines the ability of HPLC to separate complex mixtures with the sensitivity and precision of mass spectrometry, specifically NICIMS, to identify and quantify compounds. NICIMS is particularly successful in identifying compounds such as corticosteroids.
• This technique could serve as a robust method to confirm the administration of synthetic corticosteroids to horses, adding another layer in ensuring fairness in equestrian sports and safeguarding the health and well-being of the horses.