Method: Fructus crataegi and tea were identified by TLC. flavonoids was determined by colorimetry at 500 nm of wavelength, rutin was used as control substance, Chrysophanol was determined by RP-HPLC.

• 方法:对茶叶、决明子进行了薄层色谱鉴别,用比色法测定总黄酮的含量,用反相HPLC法测定决明降脂茶中大黄酚的含量。