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机构地区:[1]西北大学分析科学研究所陕西省电分析化学重点实验室,陕西西安710069
出 处:《色谱》2006年第3期247-250,共4页Chinese Journal of Chromatography
基 金:国家自然科学基金(No.20275030);陕西省自然科学基金(No.2004B20);西北大学校内基金;西北大学重点科研基地开放课题基金资助项目
摘 要:建立了应用高效液相色谱-二极管阵列检测-电化学检测(HPLC—DAD—ECD)联用技术同时测定三精双黄连口服液中的绿原酸、咖啡酸、黄芩甙和木樨草素的方法。以Zorbax SB—C18柱(150mm×4.6mmi.d.,5.0μm)为色谱柱,柱温为30℃,流动相为(A)甲醇和(B)甲醇-水-冰醋酸(体积比为50:50:1),其梯度洗脱程序为2%A3min↑→ 3%A12min → 25%A 5min↑→80%A。 流速为0.8mL/min。二极管阵列检测波长为275nm。电化学单安培检测器的工作电压为0.7V。在上述条件下实现了绿原酸、咖啡酸、黄芩甙和木樨草素的分离检测。上述4种化合物的回收率为96.6%~99.6%,相对标准偏差(RSD)为2.5%~4.1%,检测限依次为1,0.2,9和7mg/L。该方法简便、快速,重现性和准确度较好,可作为测定双黄连口服液中绿原酸、咖啡酸、黄芩甙和木樨草素的有效方法。Chlorogenic acid, caffeic acid, baicalin and luteolin in Sanjing Shuanghuanglian Oral Liquid were simultaneously detected and identified using a high performance liquid chromatography coupled with diode array detection and electrochemical detection (HPLC-DAD-ECD). The separation was performed on a Zorbax SB-C18 column ( 150 mm×4.6 mm i. d. , 5.0 μm). The mobile phase consisted of (A) methanol and (B) methanol-water-acetic acid (50: 50: 1, v/v/v) using a linear gradient elution of 2%A -3%A at 0 -3 min, 3%A -25%A at 3 - 15 min, 25%A - 80%A at 15 - 20 min. The flow rate was 0.8 mL/min. The DAD detection was used at 275 nm. The ECD detection was done at 0. 7 V. The column thermostat set at 30 ℃. The limits of detection of the 4 compounds were 1 mg/L for chlorogenic acid, 0.2 mg/L for caffeic acid, 9 mg/L for baicalin, 7 mg/L for luteolin. The average recoveries were between 96.6% - 99.6% with relative standard deviations (RSDs) of 2.5% -4. 1%. The method is simple, rapid, reproducible and accurate. It can be used for the routine analysis of the four compounds in Shuanghuanglian Oral Liquid.
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