柱前衍生化RP-HPLC测定铁皮石斛鲜品中的氨基酸的含量  被引量:5

Determination of Amino Acids in Dendrobium Officinale Fresh Product with Pre-column derivatization RP-HPLC

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作  者:鲁芹飞[1] 毕何锋 林培[1] 李妹[1] 邓路平[1] 黄松[1,2] 

机构地区:[1]广州中医药大学,510006 [2]广州中医药大学中医药数理工程研究院,东莞523808

出  处:《医学研究杂志》2014年第2期54-57,共4页Journal of Medical Research

基  金:广东省科技计划项目(2008A030101009,2011A030100011);广东省教育部产学研结合项目(2010B090400474)。

摘  要:目的测定铁皮石斛鲜品中氨基酸的含量。方法样品以异硫氰酸苯酯(PITC)为衍生化试剂衍生后进行HPLC分析。采用CAPCELLPAKC18SG300(250ram×4.6mm,51a,m)色谱柱,柱温为250(:;流动相A为0.05mol/L醋酸钠缓冲液(以醋酸调pH值至6.5)-乙腈(1:1),流动相B为0.05mol/L醋酸钠缓冲液(以醋酸调pH值至6.5),梯度洗脱,流速为0.6ml/rain;检测波长为254nm。结果15种氨基酸浓度在0.077-2.042μg范围内呈良好的线性关系(r:0.9994-0.9999),平均回收率为94.3%-107.7%。结论本方法灵敏、准确,具有良好的重复性和稳定性,可用于铁皮石斛中氨基酸的检测。Objective To determine and analyze amino acids in Dendrobium officinale Fresh Product. Methods The sample was derivatized with phenyi isothiocyanate ( PITC). HPLC was per - formed on a CAPCELL PAK Clg SG300 ( 4.6ram x 250ram, 5 μm) column with gradient elution of 0, 05mol/L sodium acetate buffer solution ( adjusted to pH 6.5 with acetic acid) - acetonitrile ( 1: I ) (A) and 0.05mol/L sodium acetate buffer solution( adjusted to pH 6.5 with acetic acid) (B) at the flow rate of 0.6ml/min,deteeted at 254nm. Column temperature was 25~C. Results Fifteen aminoacids had good linearity in the ranges of 0. 077 -2. 042p, g (r :0. 9994 -0. 9999).The average recoveries were 94. 3% - 107. 7%. Conclusion The method is sensitive and accurate with good stability,which is useful for the determination of amino acids in Dendrobium officinale.

关 键 词:铁皮石斛 衍生化 氨基酸 异硫氰酸苯酯 高效液相色谱 

分 类 号:R917[医药卫生—药物分析学]

 

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