Investigation of elemental concentration and extraction rate of polysccharides from Liuwei Dihuang prescription" by ICP-MS Studies on the Extraction Rate of Trace Elements in Wuling San in Simulated Gastric Fluid Optimization of extraction process for Xinshenning Tablets by Plackett- Burnman, Box-Behnken, and response surface methodology Technology of ultrasound-enhanced supercritical extraction for magnolol and honokiol Technology of ultrasound-enhanced supercritical extraction for magnolol and honokiol Study on Extraction Process of Zhanjin Ruji Effect of Ultrasonlc Extracting on the Extraction rate of Baicalin Effect or Ultrasonic Extraction on Extraction Rate of Berberine Optimization of microwave extraction process of Corydalis Rhizoma by Box-Behnken in condition of pilot scale