Separation and purification of total flavonoids from lane late navel orange by AB-8 macroporous resins

The adsorption and desorption of total flavonoids from lane late navel orange fruits were investigated by using 3macroporous resins.Results indicated that AB-8 resin was appropriate to purify the total flavonoids.Then the polyphenols from orange fruits were qualitatively and quantitatively by HPLC ( high performance liquid chromatography) . To optimize the separation process, the static and dynamic of adsorption and desorption experiments were carried out, the optimal adsorption conditions were as follows: initial concentrations in sample solution 0.75 mg/m L, p H3.0, sample loading amount 3.5 BV, flow rate 2 BV/h.The optimal desorption parameters were 80% ethanol 5 BV, flow rate of 2 BV/h, the desorption ratio was 90.73%.After purification, the content of flavonoids in product was increased from 36.04 mg/g to 334.54 mg/g. HPLC analysis results found that the flavonoids profiles of lane late navel orange were not changed after adsorption and desorption by AB-8macroporous resin. The main flavonoids were narirutin and hesperidin, the percentage content to the total flavonoids was91.14%. The results showed that AB-8 resin revealed a good ability to enrichment total flavonoids from lane late navel orange, and the method can be referenced for the enrichment of total flavonoids from other material.