共查询到20条相似文献,搜索用时 78 毫秒
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提出了高效液相色谱-串联质谱法测定葛根中葛根素和大豆苷元的含量。样品经乙醇提取,所得提取液用乙醇定容至100mL后经Waters Xterra MS C18色谱柱(150mm×3.9mm,5μm)分离,用乙腈与50mmol.L-1甲酸溶液(40+60)的混合液洗脱,采用电喷雾正离子电离多反应监测模式。葛根素和大豆苷元的质量浓度分别在0.050~0.50mg.L-1和5.0~50mg.L-1之间与峰面积呈线性关系,检出限(3S/N)均为5μg.L-1。在0.1,1.0,10.0mg.L-1 3个浓度水平进行加标回收试验,葛根素和大豆苷元的回收率分别为96.6%和97.4%。 相似文献
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高效液相色谱法测定葛粉保健品中葛根素的含量 总被引:2,自引:0,他引:2
孙林超 《理化检验(化学分册)》2008,44(10):945-946,949
对不同产区葛粉保健品中葛根素的含量进行分析,拟建立高效液相色谱法快速测定葛粉保健品中葛根素含量的方法.固定相为Agilent-C18柱(4.6 mm×300 mm,5μm),流动相为甲醇一水(70 30,体积比)溶液,流速为1.0 mL·min-1,波长为250 nm,进样量10μL.结果表明:葛根素的质量浓度在10.00~100.00 mg·L-1范围内与峰面积呈线性关系,加标回收率为99.0%~99.8%,检出限(3S/N)为1.0 mg·L-1,相对标准偏差分别为0.57%,0.64%,1.71%. 相似文献
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高效液相色谱法测定食品中的姜黄素 总被引:2,自引:0,他引:2
食品中的姜黄素经甲醇提取、净化后,以液相色谱-紫外检测器外标法定量检测.色谱条件:反相C<,18>色谱柱(250 mm x4.6 mm,5μm),以乙腈-0.05%乙酸氨水溶液为流动相等度洗脱,流速为1.0 mL/min.姜黄素质量浓度在0.5-50.0μg/mL范围内与峰面积呈线性关系,回归方程y=7440x-295... 相似文献
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高效液相色谱法测定前列泰片中山萘素的含量 总被引:1,自引:0,他引:1
建立了测定中药复方制剂前列泰片中山萘素含量的高效液相色谱方法.采用Kromasil C18色谱柱(5μm,250mm×4.6mm),以甲醇:0.1%磷酸溶液=62:38(V/V)为流动相,流速1.0mL/min,检测波长为366nm.对样品水解过程中各个影响因素进行了考察,获得优化的水解条件为采用4.5mol/L盐酸溶液,80℃水浴上水解1.5h.山萘素在0.061~610μg/mL范围内峰面积与浓度呈良好的线性关系(r为0.9999),最低检出限为0.03μg/mL,平均加标回收率为95.4%,RSD为1.4%.该方法简便、准确、重现性好,可用于前列泰片的质量控制. 相似文献
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高效液相色谱法测定马吲哚片含量 总被引:2,自引:0,他引:2
The present paper deals with the HPLC method used for the determination of mazindoI tablets,The op-timum conditions were as follows:ZORBAX CN column(4.6mn× 25cm);methanol/0.0l mol/L ammoniumdibasic phosphate buffer(8:2)as mobile phase and UV-254 detection. The proposed method is simple andrapid without the need of any preliminary separation,The results obtained are satisfactory both in recovery and precision. 相似文献
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在0.02 mol/L NH4Cl-NH3.H2O(pH8.0)的底液中,采用循环伏安法测定葛根素,得到一良好的氧化峰,峰电位Ep=+0.57V,峰电流Ip与葛根素的浓度在1.046×10-7~5.767×10-5mol/L范围内成线性关系,相关系数r为0.9989,检出限为1.046×10-7mol/L.测定葛根中葛根素的含量,平均回收率在99.8%.并且研究了葛根素在玻碳电极上的电化学行为,结果表明葛根素的电极过程具有吸附性和不可逆性. 相似文献
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反相高效液相色谱法测定3种中成药中的葛根素 总被引:7,自引:0,他引:7
建立了测定小儿清感灵片、步长新脑心通胶囊和感冒清热颗粒 3种中成药中葛根素含量的反相高效液相色谱方法。采用APEXODS色谱柱 ,以醋酸铵缓冲液 (10 0mmol/L ,pH 5 0 ) 甲醇 (体积比为 75∶2 5 )的混合溶液为流动相 ,检测波长为 2 5 0nm ,流速为 0 8mL/min。葛根素在 2mg/L~ 2 0mg/L时其色谱峰面积与质量浓度的线性关系良好 (r =0 9999) ;上述 3种中成药中的葛根素含量分别为 3 48mg/g ,1 0 8mg/ g及 1 5 2mg/ g(蔗糖型 ) ;其加样回收率分别为 99 0 % ,93 4%和 97 5 %。该法简便、快速、专属性强 ,可以作为多种中药制剂中葛根素含量的测定方法。 相似文献
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陈伟光 《广东微量元素科学》2006,13(7):41-43
为建立准确快速测定心可舒片中微量元素含量的方法,对该药生产进行质量控制,并为合理用药提供依据,采用电感耦合等离子体质谱法(ICP-MS),对心可舒片中的21种元素进行了分析。结果表明,心可舒片对心血管病的疗效与其中的微量元素有关。 相似文献
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建立了硫辛酸片中硫辛酸及其降解物快速测定的高效液相色谱方法。采用Waters XBridge色谱柱(5μm,150 mm×4.6 mm),流动相为0.05 mol/L磷酸二氢钾溶液(磷酸调至pH 2.5)-乙腈-甲醇(50∶45∶5),流速为1.0 mL/min,进样量为20μL,二极管阵列检测器,检测波长为220 nm,全波长扫描范围为200~400 nm,柱温为室温。结果表明,在上述色谱条件下,硫辛酸浓度在0.4~20.0 mg/L范围内线性关系良好(r=0.999 9);其检出限为0.2 mg/L;定量下限为0.6 mg/L;精密度RSD(n=12)为3.4%;加标回收率为100.9%,RSD为2.0%。该法简便、快速、准确、选择性好、灵敏度高,可用于硫辛酸片含量与降解物的测定。 相似文献
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《Analytical letters》2012,45(20):2551-2568
Abstract The official compendial USP method for the determination of Diphenoxylate HCI (DPHCI) and Atropine Sulphate (ATSO4) involves extensive sample manipulation followed by non-aqueous titration for (DPHCI) and gas chromatography for (ATSO4). Furthermore, the assay for individual tablets (content uniformity) is not specific. The proposed HPLC methodology offers substantial improvement in sensitivity, specificity and speed. The method provides simultaneous separation with minimum sample manipulation. The total elution time is less than ten minutes. The accuracy of the method was validated by comparing the results with those obtained by applying the USP XX method on commercial tablets. The specificity of the method was confirmed by the results of content uniformity of DPHCI which were more accurate than those obtained by the USP method. 相似文献
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《Analytical letters》2012,45(7):1177-1188
Abstract A simple, rapid and precise high-performance liquid chromatographic assay of meclizine in tablets has been developed. Reversed-phase chromatography was conducted using a mobile phase of acetonitrile and water (30% V/V) and detection at 230 nm. The recovery and coefficient of variation from six placebo tablets containing 25 mg of meclizine were 100.5% and 0.84%, respectively. Replicate regression analyses of three standard plots in the concentration range of 1–12 mcg/ml obtained on three different days gave a correlation coefficient >0.998 and the coefficient of variation of the slopes <1%. The assay was precise within day and between days as indicated by ANOVA test. The recoveries from 10 replicate tablets of the two different commercial meclizine brands were 98.5 and 100.7% of the label amount and their coefficients of variation were 1.16 and 1.71%. 相似文献