ArticleSe pu = Chinese journal of chromatography2026
[Determination of 33 non-steroidal anti-inflammatory drug residues in horse urine by QuEChERS-ultra performance liquid chromatography-tandem mass spectrometry].
Article in Se pu = Chinese journal of chromatography, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Non-steroidal anti-inflammatory drugs （NSAIDs） are often used to treat horses' injuries and pain due to long-term training and competitions. In equestrian competitions， NSAIDs do not affect the upper limit of a horse's athletic ability， but they can enable the horse to perform close to its maximum capacity by reducing inflammation and pain. This not only affects the competition results， but also fails to ensure the health and welfare of the horses. Therefore， it has become crucial to effectively monitor and control NSAIDs residues during equestrian competition. In this study， a rapid screening and determination method for 33 NSAIDs in horse urine was established using QuEChERS pretreatment combined with ultra performance liquid chromatography-tandem mass spectrometry （QuEChERS-UPLC-MS/MS）. The pretreatment process， chromatographic conditions， and mass spectrometric conditions were also optimized. In brief， the target analytes in 1 mL of horse urine samples were extracted with 5 mL of acetonitrile. During extraction， 100 mg of NaCl was added as a salting-out agent， and the mixture was shaken for 3 min. Subsequently， the extract was purified using a QuEChERS method with 300 mg of anhydrous MgSO
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