药用植物铃兰中吖丁啶-2-羧酸的测定

使用强阳离子交换柱分离、pH梯度洗脱、柱后衍生、荧光λex＝338nm和λem＝425nm检测的高效液相色谱法，成功地分析了药用植物铃兰中的吖丁啶－2－羧酸，方法回收率为96．4％。

Determination of the Azetidine-2-Carboxylic Acid from Lily of the Valley

This paper reports the separation and determination of the azetidine-2-carboxylic acid in lily of the valley by high performance liquid chromatography (HPLC) with post-column derivatization and fluorescence detection. The operating conditions were cation exchange resin column (30 cm x 0.4 cm i.d.) with buffer solution A [1.96% (mass fraction) sodium citrate solution pH 3.10 +/- 0.02] and B [2.1% (mass fraction) sodium nitrate solution pH 9.60 +/- 0.02] as mobile phase at flow-rate of 0.4 mL/min, gradient elution, column temperature 65 degrees C, detection wavelength lambda ex = 338 nm and lambda em = 425 nm. The retention time of azetidine-2-carboxylic acid was 5.86 minutes. The recovery was 96.4% and coefficient of variation was 0.94%. This method is simple, rapid and sensitive.