中文摘要：

采用高效液相色谱法测定橄榄果实甲醇提取物中没食子酸的含量，并用二苯基苦基苯肼自由基（DPPH·）法研究了橄榄果实提取物的自由基清除能力。没食子酸质量浓度在8．4．42mg／L范围内，没食子酸峰面积与其进样量呈良好的线性关系（R=0．9993），没食子酸平均质量分数4．03％，相对标准偏差（RSD）（n=6）1．77％，平均回收率98．75％，RSD（n=6）1．21％。该方法简单灵敏，准确可靠，重复性好。橄榄果实甲醇提取物具有较高的自由基清除能力，DPPH·的半数抑制浓度（IC50）为40．14mg／L。

英文摘要：

The content of gallic acid in extract of white canarytree （Canarium album （Lour.）Raeusch） fruit was determined by HPLC. The radical scavenging activity of extract was determined by 1,1-diphenyl-2-picrylhydrazyl （DPPH） assay. The linearity of gallic acid content was over the range of 8.4-42 mg/L with good linear correlation （ R = 0.999 3 ）. The mean value of gallic acid content was 4.03 %, with relative standard deviation （RSD） （ n = 6） 1.77 %. The average recovery was 98.75 % with RSD （ n =6） 1.21%. The determination method is simple, sensitive, accurate, reliable and with good reproducibility. C. album fruit extract showed a very good DPPH radical scavenging activity （ IC50 ） 40.14 mg/L.