Related Experiment Video
Updated: Jun 18, 2026

Fecal Glucocorticoid Analysis: Non-invasive Adrenal Monitoring in Equids
Published on: April 25, 2016
Identification of cryptorchidism in horses by analysing urine samples with gas chromatography/mass spectrometry
David K K Leung1, Francis P W Tang, Terence S M Wan
1Racing Laboratory, The Hong Kong Jockey Club, Sha Tin Racecourse, Sha Tin, N.T., Hong Kong, China.
Abstract:
Currently there are two common radioimmunoassay-based methods for the detection of equine cryptorchidism; one measures testosterone concentrations in peripheral blood samples taken before and after an intravenous injection of human chorionic gonadotrophin (hCG) and the other measures plasma estrone sulfate. However, each of these invasive methods has its own shortfalls and neither gives unequivocal results. In this article a highly reliable gas chromatography/mass spectrometry (GC/MS) method is described based on the analysis of urine samples for the identification of cryptorchidism in horses, some as young as 2 years old.
More Related Videos
09:28One-step Metabolomics: Carbohydrates, Organic and Amino Acids Quantified in a Single Procedure
Published on: June 25, 2010
04:19An Improved Technique for Trimethylamine Detection in Animal-Derived Medicine by Headspace Gas Chromatography-Tandem Quadrupole Mass Spectrometry
Published on: March 10, 2023
Related Concept Videos
Gas Chromatography–Mass Spectrometry (GC–MS)
A gas chromatograph consists of a long, narrow capillary column with a polysiloxane coating on the inner wall. The coating...
Gas Chromatography: Introduction
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a column.
Gas Chromatography: Types of Detectors-II
Urine Studies I: Urinalysis