反相液相色谱法测定苦参中苦参碱和氧化苦参碱

建立反相液相色谱法测定苦参中苦参碱和氧化苦参碱含量的方法。提取溶剂为乙醇,选择C18色谱柱,以甲醇–水–三乙胺溶液(55∶45∶0.2)为流动相,流量为0.8 mL/min,紫外检测器波长为210 nm。苦参碱和氧化苦参碱的质量浓度在10~200 mg/L范围内均与其色谱峰面积呈良好的线性,线性相关系数均大于0.999,检出限分别为0.05,0.1 mg/L。苦参碱和氧化苦参碱的加标回收率分别为98.47%,97.89%,测定结果的相对标准偏差分别为1.32%,1.08%(n=6)。该方法操作简便,干扰少,灵敏度高。     

反相高效液相色谱法同时测定苦豆子及其制剂中苦参碱和氧化苦参碱

建立了用反相高效液相色谱法测定苦豆子及其制剂中苦参碱和氧化苦参碱的方法。色谱条件：ＯＤＳ柱，甲醇－水－三乙胺，φ（甲醇）＝０．５５，φ（三乙胺）＝０．０００２为流动相，紫外检测波长２１５ｍｍ。为苦豆子及共制剂的质量评价提供了一种方法     

反相高效液相色谱法同时测定苦豆子及其制剂中苦参碱和氧化苦参碱

建立了用反相高效液相色谱法测定苦豆子及其制剂中苦参碱和氧化苦参碱的方法。为苦豆子及其制剂的质量评价提供了一种方法。     

液相微萃取/后萃取-高效液相色谱法测定氧化苦参碱和苦参碱

建立了液相微萃取/后萃取-高效液相色谱法测定中药苦参、复方苦参注射液中氧化苦参碱和苦参碱含量的方法。利用自制的微萃取装置,选择异丙醇为萃取有机溶剂,2.00 mL NaOH(pH9)为供相,HCl(pH4)为接受相,聚丙烯腈纤维的长度为10 cm,搅拌速度为1500 r/min,萃取时间为30 min。萃取完成后,经高效液相色谱仪分析,测得氧化苦参碱和苦参碱线性范围分别为11~437 mg/L和10~433 mg/L;检出限均为1.0mg/L;相对标准偏差分别小于9.4%和6.7%。复方苦参注射液中氧化苦参碱和苦参碱的平均回收率分别为83.0%~116.1%和108.8%~117.8%;苦参药材中氧化苦参碱的平均回收率为104.3%~114.7%。本方法有机溶剂用量少,可有效去除复杂机体的干扰,测得结果满意。     

高效液相色谱法测定感冒止咳颗粒中黄芩苷的含量

采用高效液相色谱(HPLC)法,用C18色谱柱,甲醇-水-冰乙酸为(55:45:1,V/V/V)流动相,在波长276 nm处测定感冒止咳颗粒中黄芩苷的含量.黄芩苷在0.101～1.01μg范围内与峰面积有良好的线性关系(r=0.9998),平均回收率为100.26%,相对标准偏差为1.52%(n=6).该法操作简便,分析速度快,结果准确,可用于感冒止咳颗粒中黄芩苷含量的测定.     

Simultaneous Determination of Olanzapine and Fluoxetine by HPLC

A rapid, specific reversed phase HPLC method has been developed for simultaneous determination of olanzapine and fluoxetine in their formulations. Chromatographic separation of these two pharmaceuticals was carried out on an Inertsil C₁₈ reversed phase column (150 mm × 4.6 mm, 5 μm) with a 40:30:30 (v/v/v) mixture of 9.5 mM sodium dihydrogen phosphate (pH adjusted to 6.8 ± 0.1 with triethylamine), acetonitrile and methanol as mobile phase. The flow rate 1.2 mL min⁻¹ and the analytes are monitored at 225 nm. Paroxetine was used as internal standard. The assay results were linear from 25 to 75 μg mL⁻¹ for olanzapine (r ² ≥ 0.995) and 100–300 μg mL⁻¹ for fluoxetine (r ² ≥ 0.995), showed intra- and inter-day precision less than 1.0%, and accuracy of 97.7–99.1% and 97.9–99.0%. LOQ was 0.005 and 0.001 μg mL⁻¹ for olanzapine and fluoxetine, respectively. Separation was complete in less than 10 min. Validation of the method showed it to be robust, precise, accurate and linear over the range of analysis.     

高效液相色谱法同时快速测定凉茶中11种非法添加化学药物

采用核-壳亚3μm色谱柱建立了高效液相色谱同时测定凉茶中11种非法添加药物(对乙酰氨基酚、阿司匹林及其降解物水杨酸、磺胺甲唑、磺胺嘧啶、磺胺二甲嘧啶、氧氟沙星、环丙沙星、洛美沙星、土霉素、强力霉素)的方法。样品经甲醇-乙腈(1∶1)超声提取,安捷伦Poroshell 120 EC C18(100 mm×4.6mm,2.7μm)色谱柱分离,以0.1%三氟乙酸三乙胺溶液(p H 3.0)-甲醇-乙腈为流动相,梯度洗脱,流速1.2 m L/min,柱温35℃,采用二极管阵列检测器检测,外标法定量。11种成分的线性范围为0.5~25 mg/L,相关系数均不小于0.998 2,检出限为1~5 mg/L,平均回收率为86.9%~108.0%,相对标准偏差(RSD)为0.5%~1.4%。按上述方法对286批凉茶样品进行检测,发现9批阳性样品,检出成分为对乙酰氨基酚、阿司匹林及其水解物水杨酸、磺胺甲唑。阳性样品进一步采用液质联用法定性确证。该方法操作简便、灵敏、准确,适用于凉茶中11种化学成分的测定。     

Simultaneous Determination Baicalin and Forsythin in Shuanghuanglian Oral Liquid by HPLC/DAD and LC‐ESI‐MS

Rapid, simple and reliable HPLC/DAD and LC‐ESI‐MS methods for the simultaneous determination of baicalin and forsythin in the traditional Chinese medicinal preparation Shuanghuanglian oral liquid were described and validated. The separation condition for HPLC/DAD was optimized using a BDS hypersil C18 column (Thermo, 2.1 × 150 mm, particle size 5 μm) by gradient elution using methanol‐0.2 % ammonium acetate as the mobile phase. The suitable detection wavelength was set at 277 nm for the quantitative analysis of baicalin and forsythin in this method. Some operational parameters of the ESI interface were optimized, negative m/z 445[M?H]^? for baicalin and negative m/z 593[M+CH₃COO]^? for forsythin, positive m/z 447[M+H]⁺ for baicalin and positive m/z 552[M+NH 4]⁺ for forsythin, respectively. These HPLC/DAD and LC‐ESI‐MS methods were validated in terms of recovery, linearity, accuracy and precision (intra‐ and inter‐day validation). These methods can be used as a complementary method for the commercial quality control of Shuanghuanglian oral liquid and its pharmaceutical preparations.     

柱后光化学衍生高效液相色谱法同时测定牛奶中黄曲霉毒素

建立了高效液相色谱法同时测定牛奶中黄曲霉毒素B1,B2,G1,G2的方法。用乙腈和水的混合溶液(体积比为80∶20)提取牛奶样品中4种黄曲霉毒素,提取液经Mycosep 228 AflaPat多功能净化柱净化,浓缩后采用C18色谱柱分离,光化学衍生后进入荧光检测器测定,外标法定量。对牛奶样品进行加标回收和精密度试验,黄曲霉毒素B1,B2,G1,G2的检出限分别为0.50,0.10,0.50,0.10μg/kg,回收率均在85%以上,测定结果的相对标准偏差为1.72%～3.52%(n=6)。该方法操作简单,速度快,重现性好,满足牛奶中黄曲霉毒素检测的要求。     

毛细管电泳测定三精双黄连口服液中的黄芩甙元、黄芩甙、绿原酸和咖啡酸

建立了毛细管电泳法测定中药复方制剂双黄连口恨液中黄芩甙元、黄芩甙、绿原酸和咖啡酸的方法,通过研究缓冲溶液pH和浓度、分离电压、进样时间和有饥添加剂的影响优化了分析条件在优化的条件下,20min内实现了4种物质的良好分离黄芩甙元、黄芩甙、绿原酸和咖啡酸峰高和质量浓度分别在0．05～1．50、0.06～1．20、0．02～0．50和0．02～0．50g／L范围内呈良好线性;俭出限分别为0．015、0．020、0．004、0．004g／L基于迁移时间和峰高的重复性分别为：黄芩甙元,1．70％和3．94％;黄芩甙,1．60％和3．63％;绿原酸,1．60％和2．05％;咖啡酸,1．51％和2．83％通过分析实际样品并做加标回收实验验证了该方法的可行性。     

Simultaneous determination of matrine, sophoridine and oxymatrine in Sophora flavescens Ait. by high performance liquid chromatography

Following a detailed study, a reversed-phase high performance liquid chromatographic method (HPLC) has been developed and validated for analysis of three bioactive alkaloids, matrine, sophoridine and oxymatrine, in Sophora flavescens Ait. HPLC separation of the alkaloids was performed on a Kromasil C(18) column and detected by ultraviolet absorbance at 208 nm. The column temperature was maintained at 40 degrees C. A mobile phase composed of 0.01 mol/L KH(2)PO(4) buffer-methanol-triethylamine in the ratios 94:6:0.01 (v/v) was found to be the most suitable for this separation at a fl ow-rate of 1.0 mL/min and enabled the baseline separation of the three analytes free from interferences with isocratic elution. The analysis time was 24 min per injection. The calibration was linear in the range of 0.2-120.0 micro g/mL for matrine, 0.2-115.2 micro g/mL for sophoridine and 0.2-110.4 micro g/mL for oxymatrine, respectively. For assaying Sophora Flavescens Ait. samples, the relative standard deviations were 2.0% for matrine, 2.8% for sophoridine and 1.8% for oxymatrine analysis. The average recoveries of matrine, sophoridine and oxymatrine were 93.9, 95.3 and 93.5% for the Sophora flavescens Ait. samples, respectively. The method has been successfully applied to the simultaneous determination of matrine, sophoridine and oxymatrine in Sophora Flavescens Ait. samples collected in different habitats.     

Simultaneous Determination of the Purity and Potency of Vancomycin and Norvancomycin by HPLC

Vancomycin B and norvancomycin of chromatographic purity >99.0%, have been obtained by semi-preparative chromatography. Microbiological assays were used to measure the potency of the purified components, and the quantitative relationship between mass (mg) and potency (units) of pure vancomycin B and norvancomycin was determined. The values obtained were 1,123 units of vancomycin per milligram pure vancomycin B (C₆₆H₇₅Cl₂N₉O₂₄), with fiducial limits of error (FL) from 1,105 to 1,144 units, and 1,025 units of norvancomycin per milligram pure norvancomycin (C₆₅H₇₂Cl₂N₉O₂₄), with FL from 1,011 to 1,039 units. The potency (units mg⁻¹) of the main active component of house reference standards of vancomycin and norvancomycin could be determined by HPLC. Thus, in routine quality control, potency and purity could be assayed simultaneously by use of HPLC.     

用HPLC法测定五氯硝基苯和多菌灵的复配制剂

采用ＨＰＨｙｐｅｒｓｉｌＣ１８色谱柱,甲醇和水梯度洗脱,用二极管矩阵检测（２５４ｎｍ）的ＨＰＬＣ法,１２ｍｉｎ内同时测定了五氯硝基苯－多菌灵可湿性粉剂中２种有效成分的含量。该法简便、快速、准确,标准偏差分别为０．１２％和０．１５％,相对标准偏差分别为０．４６％和１．４４％。     

黄芩及其制剂中黄芩素和黄芩甙的

用毛细管区带电泳 -电化学检测法测定了黄芩及其制剂中黄芩素和黄芩甙的含量。研究了电极电位、电解液酸度和浓度、电泳电压及进样时间等对电泳的影响 ,得到了较为优化的测定条件。以直径为300μm的碳圆盘电极为检测电极 ,电极电位为0.90V(vsSCE) ,在100mmol/L硼酸盐缓冲液(pH9.0)中 ,上述两组分在8min内完全分离。黄芩素和黄芩甙浓度与电泳峰电流分别在5.0×10 -7～1.0×10 -3mol/L和1.0×10 -6～1.0×10 -3mol/L范围内呈良好线性 ,检出限分别为2.24×10 -7mol/L和5.48×10 -7mol/L。7次测定分别含5.0×10 -4mol/L黄芩素和黄芩甙试样溶液 ,峰高的相对标准偏差分别为3.53%和4.03%。     

Preparation of an ionic liquid-functionalized polymer monolith and its application in the separation of Chinese herb with HPLC

A porous functionalized monolithic material based on ionic liquids (ILs) was produced through in situ polymerization within the confines of a stainless steel column (50 × 4.6 mm i.d.). In the processes, 1-vinyl-3-butylimidazolium chlorine ionic liquid, 1-dodecylene, and butyl methacrylate were used as ternary monomers; ethylene dimethacrylate as the cross-linker; azobisisobutyronitrile as the initiator; and dodecanol as the porogen. The optimized monolith showed high permeability as 13.54 × 10^?14 m², and high porosity as 75.08%. Then, its chromatographic characteristic was estimated by being used as the stationary phase of high-performance liquid chromatography (HPLC) to separate the mixtures of aromatic series compounds. Finally, the monolith was used to separate gastrodin from Chinese herb gastrodia rhizome; benzene and biphenyl from the effluent water, respectively. The column efficiency of the obtained IL-based monolith was calculated by the gastrodin peak as 22,000 plates m^?1. Moreover, the repeatability of the method was studied with the RSDs calculated by retention times and peak areas of gastrodin peak as 0.79%, 1.23% (run-to-run, n = 6) and 0.86%, 1.89% (column-to-column, n = 6), respectively. The results confirmed that the produced monolith was successfully used as the stationary phase of HPLC to separate small molecules in real samples with high performance.     

液相色谱法测定中药材中的富马酸单甲酯与富马酸二甲酯

建立了同时测定中药材中富马酸单甲酯(MMF)和富马酸二甲酯(DMF)的高效液相色谱方法。样品经乙酸乙酯提取、氨基复合石墨碳固相萃取柱净化后,C18柱分离,二极管阵列检测器检测。在0.025~5.0 μg/mL浓度范围内,色谱峰面积与分析物浓度呈良好线性关系,MMF和DMF的检出限(S/N=3)分别为0.015、0.020 mg/kg,定量下限(S/N=10)分别为0.05、0.06 mg/kg。当加标浓度水平为0.1、0.2、0.5 mg/kg时,MMF和DMF的回收率为78.9%~97.3%,相对标准偏差(RSD,n=6)为1.7%~6.0%。方法灵敏、可靠,能够满足中药材中MMF和DMF残留检测的要求。     

Simultaneous Determination of Bifonazole and Benzyl Alcohol in Pharmaceutical Formulations by Reverse-Phase HPLC

A simple, precise and sensitive reverse-phase high performance liquid chromatographic (RP-HPLC) method has been developed for the quantitation of bifonazole, an imidazole antifungal, simultaneously with benzyl alcohol, used as preservative, in pharmaceutical formulations. Method employed Zorbax Eclipse XDB-C18 (250×4.6 mm i.d., 5 m) column, methanol - ammonium acetate (pH 2; 65 mM) (65:35, v/v, pH^* 3.6) as mobile phase with flow rate of 1 mL min^–1 and variable UV detection at 220 and 252 nm. The proposed method was validated by testing its linearity, selectivity, recovery, repeatability, LOD/LOQ values and it was successfully employed for the determination of bifonazole and benzyl alcohol in pharmaceutical cream-based formulations.     

Simultaneous Determination of Tetrahydropalmatine, Magnolol, Emodin and Chrysophanol in Chinese Herbal Preparation by RP-HPLC-PDA

A reversed phase high performance liquid chromatography coupled with photo-diode array (RP-HPLC-PDA) detection method was proposed for simultaneous determination of tetrahydropalmatine, magnolol, emodin and chrysophanol in a Chinese herbal preparation (Dan’an mixture). The separation was performed on a Diamonsil? C₁₈ column (250 × 4.6 mm, 5 μm) with methanol and 0.1% phosphoric acid (88:12, v/v) as the mobile phase at the flow-rate of 0.8 mL min^?1. Two detection wavelengths were utilized for the quantitative analysis (209 nm for tetrahydropalmatine and magnolol, and 220 nm for emodin and chrysophanol, respectively). A good linear regression relationship (r ≥ 0.9996) between peak-areas and concentrations was obtained over the range of 0.25–50 μg mL^?1 for all the analytes. The spike recoveries, measured at three concentration levels, varied from 90.13 to 102.11%. The method was successfully applied to determine the contents of the four compounds in Dan’an mixture.     

QuEChERS/HPLC/DAD法同时检测果蔬中多种植物激素残留

采用高效液相色谱法,建立了同时分析玉米素(Z)、赤霉酸(GA)、多效唑(PBZ)、4-氟苯氧乙酸(4-FPA)、4-氯苯氧乙酸(4-CPA)、吲哚-3-乙酸(IAA)、吲哚-3-丁酸(IBA)、6-苄氨基嘌呤(6-BA)、脱落酸(ABA)、萘乙酸(NAA)、氯吡脲(CPPU)、2,4-二氯苯氧乙酸(2,4-D)及2,4,5-三氯苯氧乙酸(2,4,5-T)13种植物激素含量的方法。采用含0.5%甲酸的80%乙腈进行提取,分散固相萃取吸附剂(C18和硅藻土)进行净化,选取Waters XBridge C_(18)色谱柱,以乙腈-水为流动相进行梯度洗脱,二极管阵列检测器200~400nm检测,外标法定量。结果表明,13种植物激素在50 min内可实现基线分离,在线性范围内的相关系数(r)为0.992 1~0.999 3;加标回收率为68.4%~95.1%;相对标准偏差(RSD)均小于5%;方法的检出限为0.005~0.020 mg/kg;定量下限为0.01~0.09 mg/kg。该方法前处理操作快速、简便,具有良好的灵敏度、精密度和回收率,适用于果蔬的质量监控。     

Simultaneous Determination of Acteoside, Astragaloside IV and Icariside-I in the Traditional Chinese Medicinal Preparation Shenbao by HPLC–MS

A liquid chromatography–electrospray (ES)–mass spectrometric method for the simultaneous determination of Acteoside, Astragaloside IV and Icariside-I in the Traditional Chinese Medicinal Preparation Shenbao tablets is described. The samples were separated on an Alltima C₁₈ column by linear gradient elution using water–acetonitrile as the mobile phase. Some operational parameters of the ESI interface were optimized. The method is linear over the range of 0.1–10μg mL⁻¹ for Acteoside, Astragaloside IV, and 0.03–3μg mL⁻¹ for Icariside-I. The method has a precision (%CV) of <20%, and an accuracy (%RE) of < ± 10%. It can be used as a complementary method for quality control of Shenbao Tablets while HPLC–UV can be used for the other main components (Icariin, Icariside-II, Psoralen, Isopsoralen, and Osthol).