Objective To establish the quality standard of charred Radix et Rhizoma Rhei. Methods Kromasil-C18 column (4.6 mm?150 mm, 5 ?m) was used with mobile phase of methanol-0.1% phosphate acid (85∶15), 1.0 mL/min, and detection at 254 nm. Result Average recoveries of charred Radix et Rhizoma Rhei: Emodin was 98.43% and Chrysophanol was 98.32%, RSD was 1.17% and 1.02% respectively. Conclusion This method is simple. The result is accurate and reproducible. It can be used in the study of the processing technics of Radix et Rhizoma Rhei and the quality control of charred Radix et Rhizoma Rhei.

Objective To establish quality standard for prepared slices of salt-processed psoralea corylifolia.Methods Psoralen and isopsoraten in the crude psoralea corylifolia and its salt-processed products were determined by traditional identification,thin-layer identification and HPLC method.Water,ash,extract,pesticide residue and heavy metals were also detected.Results The average content of total content determination for psoralen and isopsoraten in more than 10 patches of crude and processed samples was not below 0.5% and 0.6% respectively.Conclusion HPLC method is simple and the result is reliable with good repeatability and can be used for the determination of the components in psoralea corylifolia.The quality control standards of the psoralea corylifolia is normative,systematic and the result is accurate.

Objective To establish systematic and integrated quality standard for Citrus medica. Methods To make clear the ancient applicated history and the present situation of the research of Citrus medica. The breed resources citrus medica and its medicinal present situation were investigated, and some chemical constituents from citrus medica were extracted and separated. Qualitative and quantitative methods were employed on citrus medica by HPLC methods. Results Changes in the distribution of the two variety resources of citrus medica were discovered, and six components were separated and identificated. The identificated characteristics of the two variety was found in the HPLC fingerprint for the first time. Some methods such as character identification, thin-layer identification, check of water and ash, determination of useful ingredients and the content of extracturm were established to evaluate quality standard for citrus medica. Conclusion The research on quality control standards of the citrus media is systematic and integrated, and these methods are scientific and accurate, which are suggested to the country to adopt.

AIM:To establish a quantitative method for determination of hesperidin in Citri reticulatae in order to evaluate their quality. METHODS:Sample was extracted with methanol by means of sonication for 30min. ODS column was used with methanol-water-acetic acid(35∶61∶2)as mobile phase. Detection wavelength was at 284nm. RESULTS:Hesperidin in sample solution was well separated. Linearity was good(r=0.9995)in range of 0.202～2.424?g. The average recovery was 98%, RSD of repeatability was 2.3%. CONCLUSION:This method is simple, accurate and reliable, which may well be used for the determination of hesperidin.

OBJECTIVETo develop the preparation method of licorice juice as a processing excipient and to determine the proper proportion of licorice juice and fructus evodiae during process.

METHODNine experiments were carried out through L9 (3(4)) orthogonal design. The wetting results were compared by using different proportion of licorice juice and fructus evodiae.

RESULTThe optimal preparation process was as follows: the licorice roots were cutted into slices and 12 times of water was added. Then they were decocted for 1 h. The second and third decoction were also carried out by 12 times of water and 1 h. The proper proportion of licorice juice and fructus evodiae was 1:1.

CONCLUSIONThe preparation process is scientific and suitable to prepare the processing excipient.

Chemistry, Pharmaceutical ; methods ; Drugs, Chinese Herbal ; chemistry ; Evodia ; chemistry ; Excipients ; chemistry ; Glycyrrhiza ; chemistry