HPLC法同时测定绿咖啡豆中绿原酸及咖啡碱含量
发布时间:2018-06-17 10:16
本文选题:绿咖啡豆 + 绿原酸 ; 参考:《食品研究与开发》2017年23期
【摘要】:建立一种高效液相色谱法(HPLC),可同时定量绿咖啡豆中绿原酸和咖啡碱的含量,并分析不同成熟度绿咖啡豆中绿原酸和咖啡碱含量变化。采用Agilent ZORBAX ODS-C18色谱柱,以0.5%乙酸水-乙腈为流动相,梯度洗脱,检测波长274 nm,流速1.0 m L/min,进样量10μL,柱温35℃。结果显示,绿原酸和咖啡碱的浓度线性范围分别为5.0 mg/L~100.0 mg/L(r~2=0.999 9)和5.1 mg/L~101.6 mg/L(r~2=0.999 9),检出限分别为0.25 mg/L和0.05 mg/L,相对标准偏差分别为1.56%和1.30%,回收率范围分别为98.86%~101.11%(RSD=1.02%)和98.70%~101.19%(RSD=0.83%)。
[Abstract]:A high performance liquid chromatography (HPLC) method was established to determine the content of Lv Yuan acid and caffeine in green coffee beans simultaneously and to analyze the changes of Lv Yuan acid and caffeine contents in green coffee beans with different maturity. Agilent ZORBAX ODS-C18 column with 0.5% acetic acid water-acetonitrile as mobile phase, gradient elution, detection wavelength 274 nm, flow rate 1.0 mL / min, injection volume 10 渭 L, column temperature 35 鈩,
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