采用稀盐酸水解玉米麸皮得到低聚糖阿魏酸酯（FOs）,经D301大孔树脂的除杂和聚酰胺柱层析的分离获得FOs中的F-Ara组分,分析了其纯度和结构,并比较了该组分与阿魏酸（FA）体外清除·OH的能力.结果表明：采用D301大孔树脂和聚酰胺柱层析法从玉米麸皮酸解物中分离得到的F-Ara纯度接近HPLC色谱纯级,其体外清除·OH能力在低浓度（2～6mmol/L）时与FA相似,在高浓度（6～10mmol/L）时则明显比FA强;当浓度为10mmol/L时,F-Ara对.OH的清除率达72.9%,而FA仅为62.4%.由此可见,F-Ara是一种天然高效的自由基清除剂.

Feruloylated oligosaccharides（FOs） were prepared by the hydrolysis of maize bran in dilute hydrochloric acid,and the component F-Ara was obtained by means of D301 macroporous resin chromatography and poly-amide resin purification from FOs.Then,the purity and structure of F-Ara were analyzed,and the capability of F-Ara for ·OH scavenging in vitro was compared with that of ferulic acid（FA）.The results show that（1） the purity of F-Ara approaches HPLC-purity level after the two above-mentioned resin separation processes;（2） at low concentration（2～6mmol/L）,F-Ara is similar to FA in terms of ·OH scavenging in vitro,while at high concentration（6～10mmol/L）,it is more efficient than FA;and（3） at the concentration of 10 mmol/L,the percentage of scavenging ·OH by F-Ara reaches 72.9%,while that of FA is only 62.4%.Thus,it is concluded that F-Ara is a natural and efficient free radical scavenger.