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柱前衍生RP-HPLC法测定法半夏中γ-氨基丁酸的含量

China Pharmacy(2008)

Cited 24|Views9
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Abstract
目的:建立以反相高效液相色谱法测定法半夏中γ-氨基丁酸含量的方法。方法:在碱性条件下,氨基酸与异硫氰酸苯酯反应,生成异硫氰酸苯-氨基酸的衍生物;采用Venusil-AA氨基酸分析柱(250mm×4.6mm,5μm)、二元梯度洗脱方式测定样品含量,流动相A为0.05mol.L-1醋酸钠溶液(pH6.5),流动相B为乙腈-水(80∶20),检测波长为248nm。结果:γ-氨基丁酸检测浓度在2.056~12.336μg·mL-1范围内与峰面积积分值呈较好的线性关系;加样回收率为99.0%,RSD=0.92(n=6)。结论:本方法简便、准确、重现性好,可用于法半夏的质量控制。
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Key words
Rhizoma Pinelliae Praeparatum,γ-aminobutyric acid,RP-HPLC,Content determination,Pre-column derivatization
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