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食品研究与开发:2017,38(11):144-147
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高效液相色谱法检测运动饮料中的L-肉碱
周文清
(景德镇陶瓷大学,江西 景德镇 333000)
Determination of L-Carnitine in Sports Drink by HPLC
ZHOU Wen-qing
(Jingdezhen Ceramic Institute, Jingdezhen 333000, Jiangxi, China)
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投稿时间:2016-12-09    
中文摘要: 建立一种快速、有效的高效液相色谱法测定运动饮料中 L-肉碱的方法。样品经 1.0 mmol/L 盐酸提取后,采用 MCX 固相萃取小柱进行净化和富集。采用 RP C18 柱(4.6 mm×250 mm,5 μm)分离,以乙腈 ∶ 辛烷磺酸钠(50 mmol/L)=25 ∶ 75(体积比)作为流动相,用 PDA 检测器检测,外标法峰面积定量。结果表明,L-肉碱标液在 1.0 μg/mL~20.0 μg/mL 浓度范围内线性良好,相关系数 r2 为 0.999,检出限为 0.1 mg/kg,定量限为 0.3 mg/kg,加标回收率达到 82.3 %~84.1 %。
中文关键词: 高效液相色谱  运动饮料  L-肉碱
Abstract:A rapid and effective method was established for the determination of L-carnitine in sports drink by HPLC. After the sample was extracted by 1.0 mmol/L HCl, it concentrated and purified by MCX solid phase ex- traction column. The separation of targeted compound was performed on RP C18 column(4.6 mm×250 mm, 5 μm) using acetonitrile: sodium octane sulfonate (50 mmol/L)(25 ∶ 75,volume ratio)as mobile phase, with PDA detector and external standard method peak area quantification. The linear range of L-carnitine was in the range of 1.0 μg/mL-20.0 μg/mL with a correlation coefficient of 0.999. The detection limit was 0.1 mg/kg and the quantitative limit was 0.3 mg/kg.The recovery rate was 82.3 %-84.1 %.
文章编号:201711032     中图分类号:    文献标志码:A
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