Alcohol-purification technology and its particle sedimentation process in manufactory of Fufang Kushen injection Investigation of alcohol concentration in alcohol precipitation process in compound preparation of Chinese materia medica Optimization on alcohol precipitation process for Lonicerae Flos and Artemisiae Annuae Herba in Reduning Injection by central composite design and response surface methodology Real-time release control of alcohol precipitation about Artemisiae Annuae Herba and Lonicerae Flos based on statistical process control technology Near infrared spectroscopy on-line and real-time monitoring of alcohol precipitation process of Reduning Injection