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Effects of macroporous resin on the adsorption and purification of total anthraquinones in Radix Et Rhizoma Rhei

JIN Ru-cheng~1 XIE Wei-xue~2 PANG Yan~3 (1.School of Life Science and Engineering,Lanzhou University of Technology;2.School of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,China;3.School of Chemical Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China)  
Objective To purify and prepare the total anthraquinones from Radix Et Rhizoma Rhei by macroporous resin.Methods The adsorption capacity of five types of macroporous resins to total anthraquinones of Radix Et Rhizoma Rhei were compared.Results The appropriate adsorption condition of S-8 resin was as follows:pH 9,flow rate of 1 mL/min and elution solution of 75% ethanol mixed with 5% NaOH.Its static exchange capacity was 15.48 mg/g while its dynamic exchange capacity was 23.12 mg/g,and its adsorption ratio was 92.02%.Conclusion S-8 resin has a good effect on the exchange and adsorption of total anthraquinones from Radix Et Rhizoma Rhei and has a good application prospect.
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