该文建立了高效液相色谱法测定十字花科蔬菜中萝卜硫素含量的分析方法。利用单因素实验,对西兰花中萝卜硫素的提取条件和酶解条件进行选择,确定最佳前处理条件为pH=3.0,盐酸水溶液25 ℃,水解0.5 h,乙酸乙酯涡旋提取。色谱条件:C18色谱柱(150 mm×4.6 mm, 5 μm),柱温30 ℃,流动相为乙腈-水(20∶80,体积比),流速1 mL/min,检测波长201 nm。结果表明,萝卜硫素在2.00～100.00 μg/mL范围内与峰面积有良好线性关系,西兰花和圆红萝卜中萝卜硫素精密度的相对标准偏差均小于5%,表明方法精密度高,西兰花和圆红萝卜中萝卜硫素的平均回收率分别为100.09%和96.16%,相对标准偏差均小于5%,表明方法添加回收率高,相对标准偏差小。实验建立的方法重复性好、准确度高,可以准确定量十字花科蔬菜中萝卜硫素的含量。
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