ABSTRACT
Study the suitability of organic film for salvianolic acid in the ultrafiltration process of Danshen Dizhuye. UPLC was used to analyze the migration of nine phenolic active ingredients in Danshen Dizhuye during ultrafiltration of PES hollow fiber membrane and PS hollow fiber membrane. The structural composition of multi-components was analyzed by three different batches of Danshen Dizhuye before and after ultrafiltration of the two membranes. The results showed that 9 phenolic active ingredients in Danshen Dizhuye did not change significantly after ultrafiltration through PES membrane. However, after ultrafiltration through PS membrane, the content of sodium danshensu, protocatechualdehyde, caffeic acid, 3-hydroxy-4-methoxycinnamic acid and rosmarinic acid in Danshen Dizhuye did not change significantly, while salvianolic acid D, salvianolic acid B and lithospermic acid decreased by about 20%, and the content of salvianolic acid A decreased significantly. The final content in equilibrium was only about 20% of the original solution. Therefore, an in-depth study on the migration particularity of salvianolic acid A in ultrafiltration membrane was the focuse. The results showed that the loss of salvianolic acid A was caused by both membranes during ultrafiltration, and salvianolic acid A was lost more in PS membrane. When the membrane was washed and regenerated, it was found that salvianolic acid A was detected in the ethanol washing solution, but not in the washing liquid, indicating that the loss of salvianolic acid A during the ultrafiltration was mainly adsorptive action. The results suggested that the migration of phenolic active ingredients in Danshen Dizhuye during the membrane ultrafiltration process did not completely follow the molecular weight passing rule of the membrane pore size. At the same time, it may be affected by factors, such as the structure of the membrane material, and the interaction between the membrane structure and the structure of components, and exhibit different migration behaviors during the ultrafiltration of the membrane.
Subject(s)
Alkenes/chemistry , Chromatography, High Pressure Liquid , Drugs, Chinese Herbal/chemistry , Polyphenols/chemistry , Salvia miltiorrhiza/chemistry , UltrafiltrationABSTRACT
Objective To study the structure of active polysaccharide peptide purified from Ganoderma lucidum aqueous extract, and used as a reference substance for the determination of polysaccharide peptide content in G. lucidum products. Methods GL-PPSQ2 was obtained by hot water extraction, separation and purification with membrane ultrafiltration and gel-filtration chromatography. The physicochemical determination and spectral date were used for structural identification. The content of polysaccharide peptide was detected by HPLC with UV detector, water was used as mobile phase and the flow rate was 1 mL/min. Results GL-PPSQ2 was a pure polysaccharide peptide with purity above 97%, molecular weight of 5.0 × 104, polysaccharide content of 87.17%, and yield of 0.49%. The monosaccharides composition analysis showed that GL-PPSQ2 was glucose-based polysaccharide with a small amount of mannose, which contained 16 kinds of amino acids with the total amount of amino acids of 5.04%. Based on the methylation analysis, 1D and 2D NMR spectroscopy, the repeating unit of GL-PPSQ2 was composed of →3)-β-D-Glcp-(1→backbone, with four repeating units connected a long chain branch at O-6 which was composed of α-D-Glcp-(1→, →4,6)-β-D-Glcp-(1→, →4)- β-D-Glcp-(1→ and →6)-β-D-Glcp-(1→ in sequence. Conclusion The active polysaccharide peptide was isolated and purified by membrane technology and gel chromatography. The method was simple and rapid, which provided a scientific basis for the quality control of polysaccharide peptide in G. lucidum extract and its products.
ABSTRACT
Objective To optimize the process parameters for the purification of the extract solution of Radix Astragali and Radix Puerariae in Huangqi Gegen Decoction prescription by ceramic membrane ultrafiltration. Methods With the extract solution of Radix Astragali and Radix Puerariae (in the proportion of 1 : 2) as the study object, and with solid content, puerarin transfer rate and characteristic peak area as indicators, the membrane pore size, ultrafiltrate temperature and ultrafiltration pressure were selected as the main factors, and single factor test and L9 (34) orthogonal test were used to optimize purification conditions. Results With comprehensive scores as the evaluation index, the optimized conditions for the extract solution were as follows:membrane pore size was 100 nm, ultrafiltration temperature was 35 ℃, and ultrafiltration pressure was 0.18 MPa. The main influence factors of ceramic membrane pore size and ultrafiltration pressure had obvious effects on the refined process(P<0.05).Conclusion The method of purification of the extract solution of Huangqi Gegen Decoction prescription by ceramic membrane ultrafiltration is feasible , and the results will provide reliable experimental evidence for the purification of Chinese herbal medicine extract with ceramic membrane.