柱后衍生阳离子交换色谱法同时测定新疆产贝母中17种氨基酸的含量
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篇名: 柱后衍生阳离子交换色谱法同时测定新疆产贝母中17种氨基酸的含量
TITLE:
摘要: 目的:建立同时测定新疆产贝母中17种氨基酸含量的方法。方法:采用阳离子交换色谱柱分离17种氨基酸;采用柱后衍生阳离子交换色谱法测定药材中17种氨基酸的含量:色谱柱为LCAK 06/Na柱,流动相A为柠檬酸三钠11.9 g、柠檬酸6 g、苯酚1 g,加水溶解,再加65 mL甲醇和6 mL浓盐酸,加水定容(调pH至3.4),流动相 B为柠檬酸三钠11.9 g、氢氧化钠2.8 g、苯酚1 g、硼酸5.0 g,加水溶解并定容(调pH至10.8)(梯度洗脱),流速为0.45 mL/min(A泵)、0.25 mL/min (M泵),检测波长为440 nm(脯氨酸)、570 nm(其余氨基酸),进样量为50 μL。结果:天冬氨酸、苏氨酸、丝氨酸、谷氨酸、甘氨酸、丙氨酸、缬氨酸、蛋氨酸、异亮氨酸、亮氨酸、酪氨酸、苯丙氨酸、组氨酸、赖氨酸、精氨酸和脯氨酸检测浓度线性范围均为20~400 nmol/mL(除胱氨酸10~200 nmol/mL)(r均大于0.989 0);精密度、重复性、稳定性试验的RSD<2.0%;检测限除胱氨酸外(0.08 nmol/mL)其余氨基酸均为0.16 nmol/mL;加样回收率为98.5%~99.5%(RSD为0.06%~0.21%,n=6)。结论:该方法操作简便,精密度、稳定性、重复性好,可用于新疆产贝母中氨基酸含量的同时测定。
ABSTRACT: OBJECTIVE: To establish a method of contents determination of 17 amino acids in Fritillariae Pallidiflorae Bulbus produced in Xinjiang. METHODS: Cation-exchange column was used to separate 17 kinds of amino acids; post-column derivatization liquid chromatography was used to determine the contents of amino acids: the column was strong sulfonic acid cation exchange resin LCAK06/Na with mobile phase  A (weighing trisodium citrate 11.9 g, citric acid 6 g, phenol 1 g, dissolving by water, then adding 65 mL of methanol and 6 mL of concentrated hydrochloric acid, bringing the volume with tap water, adjusting pH to 3.4), mobile phase B (weighing trisodium citrate 11.9 g, NaOH 2.8 g, phenol 1 g, boric acid 5.0 g, adding water to dissolve, adjusting pH to 10.8), gradient elution,flow rate was 0.45 mL/min for A pump and 0.25 mL/min for M pump,the detection wavelength was 440 nm for proline and 570 nm for the remaining amino acids,the injection volume was 50 μL. RESULTS: The linear range were 20~400 nmol/mL of aspartic acid,threonine, serine, glutamic acid, glycine, alanine, valine, methionine, isoleucine, leucine, tyrosine, phenylalanine, histidine, lysine, arginine, proline,10-200 nmol/mL of cystine(r were higher than 0.989 0); RSDs of precision, stability and reproducibility tests were lower than 2.0%; limits of detection were 0.16 nmol/mL except for cystine(0.08 nmol/mL); recovery was 98.5%-99.5%(RSD was 0.06%-0.21%,n=6). CONCLUSIONS: The method is simple with good precision, stability and reproducibility, and can be used for the simultaneous determination of amino acids in Fritillariae Pallidiflorae Bulbus produced in Xinjiang.
期刊: 2017年第28卷第12期
作者: 艾则孜·莫合买提,沙丽娜,阿布力米提·伊力
AUTHORS: Aziz·MOHAMMAT,SHA Lina,Ablumiti·YILI
关键字: 贝母;氨基酸;柱后衍生化;阳离子交换色谱法
KEYWORDS: Fritillariae Pallidiflorae Bulbus; Amino acids; Post-column derivatization; Cation exchange chromatography
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