METHODS Contents of anthraquinones in Radix et Rhizoma Rhei extracts were determined using HPLC after waterreflux, deoxygenated waterreflux or ethanol reflux.
方法：采用HPLC法对大黄水回流、隔氧水回流及乙醇回流后提取液中各种蒽醌类成分的含量进行监测。
2
Secondly, , check whether the drainage is smooth, there is no leakage and reflux and water phenomenon, high-grade water supplies with or without scratches.
其次，检查排水是否顺畅，有无渗漏及回流和积水现象，高档水件用品有无划痕。
3
Basis of selecting straight spraying cleaning and refluxwater compensation structure as coating-pretreatment equipment is introduced.