建立了一种大鼠尿液中黄蝶呤、异黄蝶呤、酪氨酸和色氨酸的超高效液相色谱-荧光分析方法(UPLCFLD),大鼠尿液利用甲醇和乙腈除蛋白后,采取C18固相萃取小柱进行净化,然后用UPLC-FLD法进行测定。黄蝶呤、异黄蝶呤、酪氨酸和色氨酸分别在0.01~10.0,0.005~10.0,0.5~100,0.5~200mg·L-1范围内与色谱峰面积呈线性关系,4种物质的仪器检测限分别为0.005,0.000 3,0.004和0.002mg·L-1,加标回收率除黄蝶呤在61.1%~78.0%之间,其余各物质回收率均在86.0%~110.0%之间,RSD小于10.5%。