Lever Arch File,A4 Lever Arch File,Plastic Lever Arch File,Office Lever Arch File TAISHAN JINRI STATIONERY PLASTIC CO.,LTD , https://www.jinri-folder.comDecorphin is a naturally occurring hepeptide substance. It is a potent analgesic and is a Class I prohibited drug for horse racing. In this study, the EVOQ Elite liquid chromatography triple quadrupole mass spectrometry system was used to quantify the narin in horse urine. The linear quantification range was 0.05-100ng / mL, and easily reached the lower limit of quantitation of 0.05ng / mL LLOQ).