Akin to other designer drugs, urine and serum drug screens are not yet routinely available for synthetic cathinones. Until recently there has been no immunoassay commercially available for synthetic cathinones. The few studies on the analysis of synthetic cathinones in bath salts products, urine, blood, gastric contents, and hair employ GC-MS; liquid chromatography-tandem mass spectrometry; liquid chromatography-time-of-flight mass spectrometry; and in a couple of research laboratories, nuclear magnetic resonance spectroscopy.
Gerona, Roy R, and Alan H BWu. “Bath salts.” Clinics in laboratory medicine 32.3 (2012):415-427.
Bath salts are regarded as stimulants and drug users exploit them as substitutes for methamphetamine and methylenedioxymethylamphetamine. Intoxications seen in patients from bath salts use mimic or exaggerate symptoms seen in intoxications associated with amphetamines and its derivatives. Analysis of drug contents reveal that synthetic cathinones are the major components, although other classes of designer drugs such as aminoindanes, benzofurans, and piperazines may sometimes be incorporated