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Your search keyword '"Dong, A-liang"' showing total 9 results
Start Over Author "Dong, A-liang" Journal biomedical chromatography
9 results on '"Dong, A-liang"'

2. Determination of berberine inRhizoma coptidis and its preparations by non-aqueous capillary electrophoresis

Author

Song-gang Ji, Dong-sheng Liang, Zi-ming Xu, Yutian Wu, Yifeng Chai, and Guo-qing Zhang

Subjects
Pharmacology, Aqueous solution, Chromatography, Clinical Biochemistry, General Medicine, Buffer solution, Biochemistry, Analytical Chemistry, chemistry.chemical_compound, Electrophoresis, Acetic acid, Capillary electrophoresis, Berberine, chemistry, Drug Discovery, Methanol, Molecular Biology, Sodium acetate
Abstract

A non-aqueous capillary electrophoretic method was established for the determination of berberine in Rhizoma coptidis and its preparations. The effects of organic solvent and the concentrations of sodium acetate were studied, which showed that berberine in extracts of traditional Chinese medicine can be separated successfully in a buffer solution of 75 mmol/L of sodium acetate in methanol containing 1 mol/L of acetic acid. The simple and rapid method was linear in the range 25-200 microgram/mL of berberine and had a good reproducibility, with the relative standard deviation below 2%. Non-aqueous capillary electrophoresis is a satisfactory system for the analysis of alkaloids in traditional Chinese medicine.

Published
1999

7. The separation of anthraquinone derivatives of Rhubarbby miceller electrokinetic capillary chromatography

Author

Yi‐feng, Chai, Song‐gang, Ji, Yi‐tian, Wu, Dong‐sheng, Liang, and Zi‐ming, Xu

Abstract

A micellar electrokinetic capillary chromatographic method was set up for the separation of five anthraquinone derivatives in rhubarb. Optimization of pH and sodium deoxycholate(SDC) concentrations was studied, which showed that 50 mM H3BO3‐NaOH(pH 11) containing 25 mM SDC could separate the five ingredients completely within 10 min with good reproducibility of elution time. © 1998 John Wiley & Sons, Ltd.

Published
1998
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8. Determination of ferulic acid in Angelica sinensisand Chuanxiongby capillary zone electrophoresis

Author

Song‐gang, Ji, Yi‐feng, Chai, Yu‐tian, Wu, Xue‐ping, Yin, Dong‐sheng, Liang, Zi‐ming, Xu, and Xiao, Li

Abstract

Ferulic acid in extracts of raw herbs was separated by capillary zone electrophoresis in the buffer solution of 10 mmol/L Na2B4O7. The simple and rapid method was linear, ranging from 5 to 100 µg/mL, and had a good reproducibility with the RSD below 2%. The contents of ferulic acid in Angelica sinensisand Chuanxiongcould be easily determined within 15 min with no pretreatment and no interference. Copyright © 1999 John Wiley & Sons, Ltd.

Published
1999
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9. Determination of ferulic acid in <TOGGLE>Angelica sinensis</TOGGLE> and <TOGGLE>Chuanxiong</TOGGLE> by capillary zone electrophoresis

Author

Song-gang, Ji, Yi-feng, Chai, Yu-tian, Wu, Xue-ping, Yin, Dong-sheng, Liang, Zi-ming, Xu, and Xiao, Li

Abstract

Ferulic acid in extracts of raw herbs was separated by capillary zone electrophoresis in the buffer solution of 10 mmol/L Na2B4O7. The simple and rapid method was linear, ranging from 5 to 100 µg/mL, and had a good reproducibility with the RSD below 2%. The contents of ferulic acid in Angelica sinensis and Chuanxiong could be easily determined within 15 min with no pretreatment and no interference. Copyright © 1999 John Wiley & Sons, Ltd.

Published
1999
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