HPLC法测定罗汉果中罗汉果苷ⅡE、苷Ⅲ的含量

采用ZORBAX SB-C18(4.6 mm×150 mm,5μm)色谱柱,以乙腈-水(25:75)为流动相,流速1 mL/min,柱温25℃,二极管阵列检测器,检测波长为203 nm,以外标法测定了罗汉果中罗汉果苷ⅡE、苷Ⅲ的含量。罗汉果苷ⅡE在1.934~25.142μg,苷Ⅲ在2.070~26.910μg范围内呈线性关系,平均加样回收率为96.6%与97.9%。     

HPLC法测定牙膏中柚皮苷的含量

建立了高效液相色谱测定牙膏中柚皮苷含量的方法。采用的色谱条件:Hypersil BDS C18色谱柱(250 mm×4.6 mm,5μm);柱温为40℃;以水(A相)和乙腈(B相),梯度洗脱程序为:0～15 min,10%～100%B;流速为1.0 mL/min;检测波长为283 nm;进样量为20μL。结果表明,柚皮苷的质量浓度在14.55～116.40μg/mL范围内与峰面积呈良好的线性关系(r=0.9999),平均加标回收率为97.56%。该方法稳定、准确,重现性好,可作为牙膏中柚皮苷的含量测定和质量控制方法。     

UHPLC法测定不同产地野菊花中4种有机酸和蒙花苷含量

建立采用UHPLC同时测定野菊花中绿原酸、3,4-二咖啡酰奎尼酸、3,5-二咖啡酰奎尼酸、4,5-二咖啡酰奎尼酸和蒙花苷含量的分析方法。UHPLC分析条件:Agilent ZORBAX RH C18色谱柱(50 mm×2.1 mm,1.8μm),检测波长326 nm,流动相为乙腈-0.1%磷酸水进行梯度洗脱,流速0.4 mL/min,柱温25℃。实验结果显示绿原酸、3,4-二咖啡酰奎尼酸、3,5-二咖啡酰奎尼酸、4,5-二咖啡酰奎尼酸、蒙花苷分别在1.20~24.00、1.16~23.20、2.23~44.60、1.75~35.00、2.25~45.00μg/mL范围内线性关系良好(r0.9998),平均回收率分别为98.08%、98.42%、97.75%、98.27%、98.36%;RSD分别为0.38%、1.50%、0.77%、0.81%、0.62%。UHPLC法分析速度快、高效、重复性好、结果准确简便,可用于野菊花中四种有机酸和蒙花苷含量的测定。     

HPLC法测定宁夏枸杞中法荜枝苷的含量

本文采用高效液相色谱法,建立宁夏枸杞中法荜枝苷的含量测定方法。色谱条件:Diamonsil C8柱(150mm×4.6 mm,5μm);流动相为A:乙腈-水-醋酸(5∶94.5∶0.5),B:乙腈-水-醋酸(72∶27.5∶0.5),梯度洗脱。流速:1 mL/min;柱温:30℃;检测波长:346 nm。结果表明,在0.1～10μg/mL范围内线性关系良好,相关系数r=0.9998(n=8)。法荜枝苷的平均回收率为99.1%,RSD为1.55%。该方法准确可靠,可用于测定宁夏枸杞中法荜枝苷的含量,为宁夏枸杞开发利用提供理论依据。     

HPLC测定葛花中6″-O-木糖鸢尾苷的含量

本文建立了葛花中6″-O-木糖鸢尾苷含量测定的HPLC方法。采用GRACE C18(250 mm×4.6 mm,5μm)色谱柱,流动相为乙腈-水梯度洗脱,流速为0.8 mL/min,紫外检测波长为265 nm,柱温为室温。6″-O-木糖鸢尾苷的峰面积(Y)与浓度(X)在10.33～185.99μg/mL范围内线性关系良好,Y=30731X–216635,r=0.9992(n=7);平均回收率为100.2%,RSD<2%(n=9);测得8批葛花药材中6″-O-木糖鸢尾苷含量为11.08～48.23 mg/g。方法学验证结果表明该法准确、可靠,可用于葛花中主要成分6″-O-木糖鸢尾苷的含量测定。     

HPLC法同时测定草苁蓉中草苁蓉纳拉苷和草苁蓉苷B

为建立高效液相色谱法同时测定草苁蓉干燥全草中草苁蓉纳拉苷和草苁蓉苷B的含量的分析方法,采用色谱柱:Klimail 100-5 C₁₈柱(250 mm×4.6 mm,5μm);流动相:以乙腈为流动相A,以0.5%甲酸水溶液为流动相B,梯度洗脱条件:0~12 min,15%A;12~30 min,15%~20%A;30~40 min,20%~25%A;40~45 min,25%~30%A;45~60 min,30%~100%A;流速:1.0 mL·min^-1;检测波长:260 nm;柱温:30℃;进样量:20μL。得到草苁蓉纳拉苷的线性范围为4.688~150μg·mL^-1(R²=0.999 5);草苁蓉苷B的线性范围为3.438~110μg·mL^-1(R²=0.999 1);平均回收率分别为97.86%、96.55%;RSD分别为1.01、1.23(n=9)。本研究利用高效液相色谱法建立了同时测定草苁蓉全草中草苁蓉纳拉苷和草苁蓉苷B两种组分的方法。方法学的验证结果证明,该方法简便、快捷,重现性好,可以用于草苁蓉中草苁蓉纳拉苷和草苁蓉苷B两种组分的含量测定。     

HPLC测定7种龙胆科植物花中龙胆苦苷与獐牙菜苦苷的含量

目的:建立7种龙胆花中龙胆苦苷和獐牙菜苦苷含量测定的HPLC方法。方法:采用微波辅助动态回流法进行提取,色谱条件:Fusion-RP 80 A C18柱(150 mm×4.6 mm,5μm);流动相:甲醇-0.2%磷酸溶液梯度洗脱(0~25 min:15%~30%);流速:1 mL/min;柱温:30℃;检测波长240 nm。结果:7种龙胆花中獐牙菜苦苷和龙胆苦苷的色谱峰与共存组分完全达到基线分离,线性范围分别为0.105~0.945μg(r=0.999 9),0.3~0.7μg(r=0.999 9),平均加样回收率分别为97.8%(RSD=1.02%),98.9%(RSD=1.51%)。结论:所建立的方法测定快速,结果准确可靠。     

不同采收期荔枝草中黄酮成分含量的动态变化研究

目的:为荔枝草的最佳采收期提供实验依据。方法:采用Lichrospher C18色谱柱(4.6mm×150mm,5μm);0.5%的甲酸水溶液-乙腈梯度洗脱,流速1.0mL/min,柱温:25℃,检测波长342nm。结果:高车前苷与假荆芥属苷分别在0.0472～0.472μg(r=0.9999)和0.0275～0.275μg(r=0.9999)范围内呈良好的线性关系。结论:该方法简单,结果准确可靠,重现性好。荔枝草在5月上旬未开花前黄酮含量积累达到最大,可参考作为荔枝草药材的最佳采收期。     

HPLC法测定杨梅叶中杨梅苷的含量

目的:建立HPLC法测定杨梅叶中杨梅苷含量的方法。方法:采用Diamonsil C18(150 mm×4.6 mm,5μm)柱,流动相乙腈-0.1%磷酸水溶液梯度洗脱,流速1.0 mL/min,检测波长358 nm,柱温30℃。结果:杨梅苷在0.088-0.880 mg/mL内与峰面积呈良好线性关系,A=36113C-401.56,r=0.9994;平均回收率为102.4%,RSD=1.9%(n=9)。测得杨梅叶中杨梅苷含量为1.43%。结论:该测定方法准确,可靠,对于杨梅的进一步开发利用具有重要的参考意义。     

反相高效液相色谱法测定青蒿中青蒿酸的含量

本文建立了反相高效液相色谱快速测定青蒿中青蒿酸含量的方法。色谱条件为:Diamonsil C18色谱柱(250 mm×4.6 mm,5μm),柱温为(30±1)℃,流动相采用乙腈与0.2%磷酸水溶液混合液(体积比65:35),流速1 mL/min,检测波长220 nm。标准曲线回归方程:Y=8.784573×10-8X-6.443559×10-5,r=0.9997,青蒿酸回收率为102.4%。实验证明该方法稳定可靠、精密度高、重现性好、简单可行,适用于青蒿酸的分析检测。     

HPLC同时测定伤科黄水中6个生物碱的含量

建立HPLC同时测定伤科黄水中6个生物碱的方法。采用XBridge C₁₈色谱柱(3. 5μm,2. 1 mm×100 mm),柱温35℃,测定波长280 nm,以0. 1%磷酸溶液(每100 mL加0. 3 g十二烷基苯磺酸钠)(A)-乙腈-水-磷酸-十二烷基苯磺酸钠(90∶10∶0. 1∶0. 3)(B)为流动相,进行梯度洗脱(0～30 min,B%:35～70; 30～31 min,B%:70～35; 31～40min,B%:35)。经方法学验证,黄柏碱、药根碱、表小檗碱、黄连碱、巴马汀、小檗碱等共6个生物碱分离情况良好,在测定时间段内无明显干扰峰;加样回收率均在95%～115%之间,RSD%均小于5%;精密度RSD%均小于5%;在测定浓度范围内(1～50μg/mL)线性关系良好,相关系数(R^2)大于0. 999。3个不同批次供试品的测定结果较一致。本研究建立的HPLC分析方法可用于同时测定伤科黄水中6个生物碱的含量。     

HPLC同时测定雪胆属植物中3种活性成分的含量

建立了高效液相色谱法同时测定雪胆属植物中雪胆乙素、竹节参皂苷Ⅳa和雪胆甲素含量的方法,可用于11种雪胆属植物中3种活性成分的同时测定。采用InertSustain C18(250 mm×4.6 mm,5μm)色谱柱;流动相为0.1%磷酸水溶液(A)-乙腈(B),梯度洗脱(0~20 min,5%~20%B;20~60 min,20%~30%B;60~80 min,30%~64%B);流速1.0 mL/min;柱温35℃;检测波长203 nm。经方法学考察,本方法具有准确快速、精密度高、重复性好的特点,雪胆乙素、竹节参皂苷Ⅳa和雪胆甲素分别在0.075~3.000μg、0.810~32.400μg和0.620~24.800μg范围内与峰面积呈现良好的线性关系(r≥0.999 5)。定量分析测得11种雪胆属植物中雪胆乙素含量在0.479~1.904 mg/g范围内,彭县雪胆中含量最高;竹节参皂苷Ⅳa含量在1.098~18.58 mg/g范围内,峨眉雪胆中含量最高;雪胆甲素含量在3.079~17.56 mg/g范围内,十一叶雪胆中含量最高。本方法可为雪胆属优质药用资源开发及综合利用提供参考。     

苦玄参药材中苦玄参苷ⅠA和ⅠB的含量分析

采用HPLC法对不同产地的苦玄参药材主成分苦玄参苷ⅠA和ⅠB的含量进行分析,发现苦玄参苷ⅠB含量高于苦玄参苷ⅠA;色谱条件:Waters C18(4.6mmi.d.×250mm,5μm)色谱柱,流动相∶乙睛∶水=36?64(体积比),流速为0.8mL/min,检测波长为264nm。苦玄参苷ⅠA、ⅠB分别在0.05～0.50mg/mL和0.072～0.720mg/mL与峰面积有良好的线性关系。苦玄参苷ⅠA的线性回归方程Y=13658X-92.72(r=0.9993),平均回收率为100.58%(n=5),相对标准偏差(RSD)为1.86%;苦玄参苷ⅠB的线性回归方程Y=5258.9X-41.01(r=0.9994),平均回收率为101.15%(n=5),相对标准偏差(RSD)为1.31%。该研究为制定苦玄参药材质量检测标准提供了简便、快速、准确的方法。     

梯度洗脱高效液相色谱法测定桑叶中3种活性成分的含量

建立同时测定桑叶中绿原酸、芦丁和槲皮素含量的分析方法。色谱柱为NUCLEODUR C18 RP(250 mm×4.6 mm,5μm),光电二极管检测器,流动相为甲醇-质量分数0.5%磷酸水溶液,梯度洗脱程序为0 min(30:70)-15min(30:70)-25min(50:50)-35min(85:15)-40min(30:70);流速0.8 ml.min-1,检测波长为350 nm。绿原酸、芦丁和槲皮素的线性范围分别为0.1144~1.0296μg(r=0.9996)、0.0436~0.3924μg(r=0.9999)和0.0452~0.4068μg(r=0.9997),平均回收率分别为97.7%(RSD=1.7%)、98.4%(RSD=2.2%)和100.6%(RSD=1.5%)。方法快速简便,专属性强,重复性好,可作为桑叶中绿原酸、芦丁和槲皮素的定量分析方法。     

Determining the pharmacokinetics of psilocin in rat plasma using ultra-performance liquid chromatography coupled with a photodiode array detector after orally administering an extract of Gymnopilus spectabilis

This study established ultra-performance liquid chromatography coupled with a photodiode array detector for determining psilocin and its pharmacokinetics in rat plasma after orally administering an extract of Gymnopilus spectabilis. The extract was separated on an ODS C18 column (2.3 μm, 100 mm × 2.1 mm I.D.) by gradient elution with (A) water containing 50mM AcONH(4) and (B) acetonitrile. The wavelength was set at 265 nm and the injection volume was 10 μL. Under these conditions, the calibration curve was linear over the concentration range 0.2-20 μg/mL with a correlation coefficient of r(2)=0.9992. The inter- and intraday precision levels were less than 7% and the accuracies (%) were within the range 92.0-102.5%. The method was sufficiently valid to be applied to a pharmacokinetics study of psilocin in rat plasma. The pharmacokinetic parameters of psilocin in rat plasma after the oral administration of a G. spectabilis extract were as follows: C(max), 0.43 ± 0.12 μg/mL; T(max), 90 ± 2.1 min; AUC(0→t), 1238.3 ± 96.4 (μg/mL) min; and T(1/2), 117.3 ± 40.3 min.     

新型柱前衍生试剂分析草甘膦的高效液相色谱研究

以2,5-二甲氧基苯磺酰氯(DMOSC)为柱前衍生化试剂,建立了柱前衍生草甘膦的紫外检测反相高效液相色谱法,并优化了衍生化条件,得最佳条件:衍生温度35℃,时间15 min,pH 10.0,草甘膦与DMOSC的摩尔比为1∶6。HPLC分析条件:采用Kromasil C18柱,流速1.0 mL/min,柱温30℃,检测波长220 nm,流动相为甲醇-乙腈-磷酸盐缓冲溶液(0.02 mol/L、pH 5.5),三者的体积比为15∶5∶80。结果表明:草甘膦质量浓度在5~100μg/mL范围内线性关系良好,相关系数为0.996 2,检测限为0.067μg/mL。实验表明该方法反应条件温和,灵敏度高,衍生产物稳定。     

A sensitive LC-MS/MS method for determination of levamisole in human plasma: application to pharmacokinetic study

A sensitive and rapid LC-MS/MS method was developed and validated for the determination of levamisole in human plasma. The assay was based on liquid-liquid extraction of analytes from human plasma with ethyl ether. Chromatographic separation was carried on an Agilent HC-C(8) column (150 mm × 4.6 mm, 5 μm) at 40°C, with a mobile phase consisting of acetonitrile-10 mM ammonium acetate (70:30, v/v), a flow rate of 0.5 mL/min and a total run time of 6 min. Detection and quantification were performed by mass spectrometry in the multiple reaction monitoring mode with positive electrospray ionization m/z at 205.1→178.2 for levamisole, and m/z 296.1→264.1 for mebendazole (internal standard). The assay was linear over a concentration range of 0.1-30 ng/mL with a lower limit of quantification of 0.1 ng/mL. The coefficient of variation of the assay precision was less than 8.5%. The assay was successfully used to analyze human plasma samples in a pharmacokinetic study where levamisole was administered as a liniment.     

白刺花中3种生物碱的含量及HPLC指纹图谱

为建立白刺花高效液相指纹图谱,并测定白刺花不同部位(根、茎、叶)苦参碱、槐果碱和氧化苦参碱的含量。实验采用AgilentTC-C₁₈(2)色谱柱(250×4.6 mm,5μm),以乙腈-0.09%三乙胺水溶液(4∶96,磷酸调pH3.5)为流动相,流速为1.0 mL/min,紫外检测波长205 nm,柱温35℃。建立了白刺花的高效液相指纹图谱,确定了14个共有峰,样品的相似度在0.9以上。在该色谱条件下,各成分有较好的分离度,苦参碱、槐果碱和氧化苦参碱分别在6.34～101.5、6.47～103.5、8.38～100.5μg/mL范围内呈良好的线性关系(r>0.999)。用该方法测得白刺花根中苦参碱、槐果碱、氧化苦参碱的平均含量分别为8.204 8、1.237 1、66.147 6 mg/g;茎中分别为4.246 3、1.549 6、25.035 1 mg/g;叶中分别为9.314 8、6.947 4、1.573 4 mg/g。该方法简单、准确,可用于白刺花的质量控制。     

Determination of puerarin in rat plasma by rapid resolution liquid chromatography tandem mass spectrometry in positive ionization mode

A highly sensitive and specific method of rapid resolution liquid chromatography tandem mass spectrometry (RRLC-MS/MS) in positive ionization mode has been developed and validated for pharmacokinetic study of puerarin in rat plasma. Chromatography was carried out on a Zorbax XDB C18 reversed-phase column using a mobile phase comprising a mixture of methanol and 0.05% acetic acid in water (35:65, v/v) with a flow rate of 0.3 mL/min from 0 min to 5.4 min and then 0.6 mL/min from 5.41 min to 12 min. The mass spectrometer operated in ESI positive ionization mode. Multiple reaction monitoring (MRM) was used to measure puerarin and tectoridin (internal standard). The method was sensitive with a detection limit of 0.33 ng/mL. A good linear response was observed over a range of 10-2000 ng/mL in rat plasma. The inter- and intra-day precision ranged from 2.97% to 7.52% and accuracy from 93.70% to 101.60%. This validated method was applied successfully to a pharmacokinetic study in rat plasma after intravenous administration of puerarin. The main pharmacokinetic parameters were as follows: AUC(0→t) 45.37±13.19 (mgh/L), AUC(0→∞) 47.03±14.78 (mgh/L), MRT 1.03±0.46 (h), T(1/2) 1.31±0.31 (h), V(ss) 0.09±0.02 (L), V(z) 0.17±0.04 (L), Cl 0.10±0.04 (L/h).