Umm... so were the horses or the jockeys on coke?... just making sure.
lol. We tested both the horses and the jockeys/employees for drugs of abuse. A horse in a state sponsored race must be 100% clear of all drugs in order to be considered valid. You'd be amazed at what some owners will feed their horses in an attempt to cheat and win. The jockeys and employees at the race tracks are drug tested per state regulations. During my internship, I did not once come across a positive drug screening on horse urine samples. I did, however, come across a few different positive screenings on human urine samples, though only one of them really stood out as positive.
That positive sample is the one I have all the Gas Chromatographs and Mass Spectra for. It was so blatently clear that even a non-chemist could understand it as a positive. The procedure that's used for drug testing is that first a pretty non-specific testing is done of the urine via an Immunoassay technique. (We used an Enzyme Linked Immuno-Sorbant Assay, or ELISA, screening). If a positive result is found in the preliminary screenings, it must be confirmed by a more specific, "fingerprint like" machine in order to be considered a legal positive by most sophisticated courts. So in our screening, we found that this particular urine specimen was positive for benzoylecgonine, the metabolite for cocaine. Upon getting the screening results, we then ran it through the GC/MS along with a negative control, positive control, blank, and a known sample of pure benzoylecgonine. By comparing the graphs and spectra from all those runs, we could easily see the positive result. I should have the graphs and spectra up sometime this weekend.