牵牛子生品、炒品酚酸类成分的HPLC-MS分析

目的:采用高效液相色谱-质谱联用(HPLC-MS)技术对牵牛子生品、炒品中化学成分进行分析。方法:采用Agilent Eclipse XDB-C18柱(4.6 mm×250 mm,5μm),流动相为甲醇-0.1%甲酸梯度洗脱,质谱使用ESI离子源,在负离子模式下扫描,记录总离子流图。结果:从牵牛子生品和炒品中共分离鉴定了9个共有化合物,其中7个酚酸类,1个黄酮苷类,1个酯类。结论:牵牛子炒制前后化学成分发生变化。牵牛子生品、炒品化学成分种类未发现变化,但成分含量发生变化,酚酸类成分咖啡酸、新绿原酸、绿原酸、隐绿原酸、异绿原酸A、异绿原酸B和异绿原酸C等峰强度均发生变化。其中咖啡酸、绿原酸、异绿原酸B炒后含量降低,新绿原酸、隐绿原酸、异绿原酸A及异绿原酸C炒后含量升高。     

基于UPLC-Triple-TOF/MS分析续断“发汗”前后化学成分

目的通过超高效液相色谱串联三重四级杆飞行时间质谱法(UPLC-Triple-TOF-MS)快速分析续断DipsaciRadix"发汗"前后的化学成分。方法采用Agilent Eclipse XDB-C18(250 mm×4.6 mm,5.0μm)色谱柱;流动相为0.1%甲酸水溶液-乙腈,梯度洗脱,体积流量为0.8 mL/min,检测波长215 nm,柱温为25℃;质谱采用UPLC-Triple-TOF 5600+飞行时间液质联用仪,负离子模式下扫描检测,扫描范围m/z 100～1 500。根据高分辨质谱结合二级质谱所得的信息对续断"发汗"前后化学成分进行快速的鉴定。结果根据化合物保留时间、质谱信息,推测了续断"发汗"前后52个共有化学成分,主要包括三萜皂苷类、环烯醚萜类、酚酸类等,同时分析了主要成分的裂解规律。并比较了续断"发汗"前后化学成分的差异,发现发汗后马钱苷酸、绿原酸、马钱苷、异绿原酸A、川续断皂苷VI等20种成分含量降低,咖啡酸、异绿原酸、异绿原酸C、大花双参苷A等成分含量在发汗后升高。结论研究发现续断"发汗"前后化学成分种类上无明显差异,而在成分含量上存在一定差异,未"发汗"续断化学成分含量普遍高于"发汗"续断。本实验采用UPLC-Triple-TOF-MS技术分析"发汗"对续断的化学成分的影响,为探究续断"发汗"前后化学成分物质基础和进一步为续断产地加工方式的研究提供理论依据。     

UPLC-Q-TOF-MS分析补肾强身片中化学成分

目的:采用超高效液相色谱-四级杆-飞行时间质谱(UPLC-Q-TOF-MS)对补肾强身片中的化学成分进行研究。方法:以Agilent SB-C18色谱柱(4.6 mm×100 mm,2.7μm),流动相乙腈-0.1%甲酸水溶液,梯度洗脱,流速0.5 m L·min~(-1),柱温40℃,电喷雾离子源,正、负离子模式下采集数据。首先对有对照品的成分进行定性分析,对于多数没有对照品的成分,主要根据UPLC-Q-TOF-MS提供的准确相对分子质量和离子碎片信息并结合文献数据比对进行化学成分结构推测鉴定。结果:共鉴定了补肾强身片中50个化学成分,包括酚酸类19个、黄酮类25个、裂环环烯醚萜类4个、苯乙醇苷类1个、生物碱类1个,其中12个成分(原儿茶酸,红景天苷,原儿茶醛,绿原酸,金丝桃苷,异槲皮苷,特女贞苷,朝藿定C,淫羊藿苷,山柰酚,宝霍苷I,紫云英苷)通过与对照品比对进行定性分析。结论:UPLC-Q-TOF-MS可以简便、快速地对补肾强身片中化学成分定性分析,该研究丰富了补肾强身片中化学成分的信息,为补肾强身片药效物质基础研究、质量控制及其临床用药提供了参考。     

基于UPLC-ESI-Q-TOF-MS的红禾麻提取物化学成分分析

目的:建立超高效液相色谱-电喷雾-四级杆-飞行时间串联质谱联用技术(UPLC-ESI-Q-TOF-MS)研究红禾麻提取物中的主要化学成分。方法:采用Agilent Eclipse Plus C_(18)RRHD色谱柱(2.1 mm×100 mm,1.8μm);以0.1%甲酸水溶液-0.1%甲酸乙腈溶液为流动相进行梯度洗脱;流速0.25 m L·min~(-1),柱温40℃,进样量1μL。采用电喷雾离子源(ESI),负离子模式进行检测,运用Data Analysis软件,并结合保留时间、精确相对分子质量和相关文献进行数据分析。结果:通过结合对照品及文献报道的质谱数据对红禾麻提取物中化学成分进行分析,共分析鉴定13个化学成分,包括4个儿茶素类,3个苯丙素类和6个黄酮类,其中新绿原酸、隐绿原酸、绿原酸、芦丁、异槲皮苷、木犀草苷、山柰酚-3-O-芸香糖苷、紫云英苷和槲皮苷均首次在该植物中发现。结论:研究中建立的检测方法简便、准确,为快速鉴定分析化学成分提供一种有效的分析方法,并比较全面地阐明了红禾麻提取物中的化学成分,为其质量控制和药效物质基础研究奠定一定的基础。     

基于UHPLC-Q-Exactive Orbitrap MS技术的正心降脂片化学成分研究

目的 建立一种快速鉴定中药复方制剂正心降脂片的高分辨质谱分析方法,系统阐明其化学成分组成。方法 采用超高效液相色谱-静电场轨道阱高分辨质谱(UHPLC-Q-Exactive Orbitrap MS)对正心降脂片成分进行分析,色谱柱为Thermo Accucore aQ RP18(2.1 mm×150 mm, 2.6 μm),流动相采用乙腈(A)-0.1%甲酸水(B)进行梯度洗脱,流速0.3 mL·min^-1。采用加热电喷雾离子源,正、负离子同时扫描模式采集数据。根据一级准分子离子精确质荷比、二级质谱碎片离子信息、文献报道和对照品比对鉴定正心降脂片的化学成分。结果 共鉴定了正心降脂片中105个化学成分,包括21个有机酸、59个黄酮类化合物(黄酮氧苷类37个,黄酮碳苷类10个,多甲氧基黄酮类化合物12个)、19个醌类化合物(11个蒽醌类和8个菲醌类)、3个二苯乙烯类化合物及3个其他类型化合物。其中29个化合物采用对照品比对进行了鉴定,并对各成分的药材来源进行了归属。结论 对正心降脂片的化学成分进行了系统、全面地分析,为其药效物质基础、质量控制及作用机制研究奠定了基础。     

基于HPLC-ESI-MS法续断发汗前后的成分分析

目的建立高效液相色谱-电喷雾-质谱(HPLC-ESI-MS)分析续断发汗前后成分变化的方法。方法 HPLC采用Agilent Eclipse XDB-C18(250 mm×4.6 mm,5.0μm)色谱柱;流动相为0.1%甲酸水溶液-乙腈,梯度洗脱:0~45 min,6%~20%乙腈;45~90 min,20%~35%乙腈;90~110 min,35%~70%乙腈;110~120 min,70%乙腈;柱温为30℃,体积流量为0.8 m L/min;质谱采用电喷雾离子源,正负离子模式下全扫描检测,并通过[M-H]-、[M+HCOO]-、[M+H]+、[M+Na]+等离子信息推断化合物。结果建立了续断发汗前后的HPLC-ESI-MS图谱,均得到42个色谱峰,通过与对照品和文献对照,推断出了31个化合物;续断经产地加工发汗后,有些成分的量下降,如马钱苷酸、隐绿原酸、绿原酸、咖啡酸、马钱苷、异绿原酸B、续断苷A、续断苷B等;有些成分的量升高,如茶茱萸苷、川续断皂苷X、川续断皂苷VI、川续断皂苷VII、川续断皂苷乙、川续断皂苷XIII、川续断皂苷A等;其他成分的量几乎不变。结论所建立的HPLC-ESI-MS图谱,便于全面控制续断发汗与未发汗药材的质量。     

HPLC-DAD-Q-TOF-MS/MS法的银黄颗粒主要成分定性与定量研究

目的采用高效液相色谱串联四极杆飞行时间质谱(HPLC-Q-TOF-MS/MS)快速鉴定银黄颗粒化学成分和HPLC-DAD法同时定量测定银黄颗粒中15种成分(獐牙菜苷、马钱苷、新绿原酸、绿原酸、隐绿原酸、咖啡酸、芦丁、异绿原酸B、异绿原酸A、异绿原酸C、野黄芩苷、黄芩苷、汉黄芩苷、黄芩素、汉黄芩素)。方法分析采用月旭Ultimate-XB C18色谱柱(4.6 mm×150 mm,5μm),流动相为乙腈-0.1%甲酸水,梯度洗脱,体积流量0.8 m L/min,柱温30℃。飞行时间质谱,采用负离子模式扫描。二极管阵列检测器的检测波长为240、276、326 nm。结果 HPLC-Q-TOF-MS/MS法推断鉴定银黄颗粒中的44种成分,HPLC-DAD定量分析银黄颗粒中15种成分在考察的质量浓度范围内,与峰面积之间呈良好的线性关系(r>0.999 0);回收率均在97.3%~100.9%范围内,RSD为1.4%~2.8%。结论通过HPLC-Q-TOF-MS/MS法和HPLC-DAD法鉴定银黄颗粒的化学成分优于HPLC法,尤其测定环烯醚萜苷类成分(獐牙菜苷、马钱苷)可为综合评价银黄制剂的质量提供参考。     

UPLC-Q-TOF-MS/MS快速鉴别北豆根中的生物碱类成分

目的:利用UPLC-Q-TOF-MS/MS技术对北豆根中的生物碱化学成分进行分析和鉴定。方法:采用Welch C18色谱柱(2.1 mm×100 mm,1.7μm),以0.1%氨水溶液(A)-乙腈(B)为流动相进行梯度洗脱,流速0.3 mL·min~(-1),柱温40℃,进样体积2μL。质谱采用电喷雾(ESI)离子源,在正离子模式下采集数据,质量数扫描范围m/z 50~1 250,使用质谱分析软件中的目标化合物筛查法,通过保留时间、精确相对分子质量和二级质谱裂解碎片鉴定监测到的化学成分。结果:在优化的LCMS条件下,结合Scifinder数据库、对照品和相关文献鉴定了37个生物碱类化合物,包括双苄基异喹啉类、阿朴啡及氧化异阿朴啡类、单苄基异喹啉类等。结论:基于HPLC-ESI-Q-TOF技术,通过高效液相色谱分离,质谱测定相对分子质量、裂解数据、文献分析检索,能快捷、准确、较全面地鉴定北豆根中的生物碱类化学成分,为北豆根化学成分的进一步提取分离和药效物质基础的研究提供科学依据。     

UPLC/Q-TOF-MS/MS分析中华常春藤中的化学成分

目的利用超高效液相色谱-飞行时间质谱联用技术(UPLC/Q-TOF-MS/MS),对中华常春藤Hedera nepalensis茎叶中的化学成分进行分析和鉴定。方法采用Welch C18色谱柱(100 mm×2.1 mm,1.7μm),以0.1%甲酸水溶液(A)和乙腈(B)为流动相进行梯度洗脱,体积流量0.3 m L/min,柱温40℃,进样量5μL。质谱采用电喷雾(ESI)离子源,在正负离子模式下采集数据,使用质谱分析软件中的目标化合物筛查法,通过保留时间、精确相对分子质量和二级质谱裂解碎片鉴定监测到的化学成分。结果在优化的液质联用条件下,结合Scifinder数据库、对照品和相关文献鉴定了43个化合物,包括三萜皂苷、黄酮苷类、苯丙素类和核苷类化合物。结论 UPLC/Q-TOF-MS/MS方法能快捷、准确、较全面地鉴定中华常春藤中的化学成分,为中华常春藤化学成分的进一步提取分离和药效物质基础的研究提供科学依据。     

UPLC-Q-TOF-MS/MS快速分析杏贝止咳颗粒化学成分

应用UPLC-Q-TOF-MS/MS对杏贝止咳颗粒的化学成分进行分析和鉴定。液相条件:Agilent Zorbax SB-C_(18)(4.6 mm×250 mm,5μm)色谱柱,以甲醇和0.08%甲酸水溶液(含0.1%甲酸铵)为流动相进行梯度洗脱,流速1mL·min~(-1),柱温30℃;质谱条件:采用电喷雾(ESI)离子源,正负离子模式下采集数据,根据精确质荷比、二级质谱裂解碎片等信息结合对照品的比对和文献数据进行化合物解析,结果共鉴定和推测出87个化合物,包括生物碱类、黄酮类、香豆素类及皂苷类等,其中23个化合物经对照品验证。该结果为阐明杏贝止咳颗粒的药效物质基础奠定了基础,并为质量控制提供参考。     

基于UPLC-Q-TOF-MS/MS技术的彝族药姜味草化学成分分析

目的 应用超高效液相色谱-串联四级杆飞行时间质谱联用技术(UPLC-Q-TOF-MS/MS)对彝族药姜味草中的化学成分进行定性分析。方法 Waters Acquity UPLC BEH C₁₈色谱柱(2.1 mm×100 mm,1.7 μm),以乙腈(A)-体积比0.1%甲酸水溶液(B)梯度洗脱,质谱分析采用信息关联模式(IDA),在正、负离子模式下采集数据。结果 根据化合物的精确分子质量和碎片离子信息,结合对照品比对和文献数据,从姜味草中鉴定推断出77个化学成分,包括黄酮类27个、有机酸类21个、苯丙素类8个、三萜酸类8个、氨基酸类6个,其他类:蒽醌类、环烯醚萜类、醇类等7个。结论 首次对姜味草中的化学成分进行快速鉴别,为其质量控制及药效物质基础提供了科学依据。     

基于UHPLC-Q-TOF-MS/MS和LTQ-MSn联用技术快速鉴定绞股蓝皂苷类化学成分

目的 建立超高液相色谱-飞行时间高分辨质谱(UHPLC-Q-TOF MS/MS)和超高液相线性离子阱质谱(LTQ-MSⁿ)联用技术对绞股蓝中皂苷类成分快速鉴定的方法。方法 采用Thermo Syncronis C₁₈(2.1 mm×100 mm,1.7 μm)色谱柱,以纯水-乙腈为流动相梯度洗脱,质谱采用电喷雾(ESI)离子源,在负离子模式下采集数据对绞股蓝皂苷类进行成分鉴定。结果 初步鉴定了81种绞股蓝皂苷,其中包括58种已知皂苷和23种可能的未知皂苷结构。结论 UHPLC-Q-TOF-MS/MS可以提供化合物的准确相对分子质量及二级碎片信息,LTQ-MSⁿ可以提供化合物多级质谱信息,该联用技术可以简单、快速鉴定绞股蓝皂苷类成分,并为其质量控制、药效物质基础研究及进一步临床应用提供理论依据和科学研究思路。     

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??OBJECTIVE To identify the metabolites of Cuscuta chinensis in the serum and feces of rats with estrogenic estrogen, and to provide the basis for elucidating the pharmacological basis of its efficacy. METHODS Using the HPLC-ESI-MS/MS technique, the molecular weight and molecular formula of the compounds were preliminarily estimated by the first-order mass spectrometry, and the chemical constituents of serum and feces were characterized by the retention time of the standard, the fragment ion information, the fragmentation law of mass spectrometry and the reference data. RESULTS Five prototypic components and 4 metabolites were identified in the serum. A total of 11 chemical constituents were identified in the feces after administration, including 5 prototype components and 6 metabolites. CONCLUSION Through the comparative analysis between serum and feces, the main metabolic pathways of Cuscuta chinensis compound are deduced, which provides reference for the basic research on the estrogenic substance of Cuscuta chinensis.     

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??OBJECTIVE To qualitatively analyze the chemical constituents of Folium hibisci Mutabilis by high performance liquid chromatography-electrospray ionization-quadrupole-time of flight-mass spectrometry (UHPLC-Q-TOF-MS/MS).METHODS The separation was performed on a UHPLC Welch C₁₈ column (2.1 mm??100 mm,1.7 ??m), with acetonitrile-0.1% formic acid as the mobile phase for gradient elution;ESI ion source was used; the data was collected in a negative ion mode.The chemical components of Folium hibisci Mutabilis were identified by analyzing the retention time, exact relative molecular mass, and cleavage fragments of MS/MS.RESULTS A total of 73 compounds were identified in Folium hibisci Mutabilis,including 42 flavonoids,15 triterpenoids,11 organic acids,3 coumarins,and 2 other kinds of compounds by UPLC-Q-TOF-MS.CONCLUSION LC-MS/MS can identify the chemical components of Folium hibisci Mutabilis in a simple,which would provide a foundation for further exploration of the effective substances of Folium hibisci Mutabilis.     

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??OBJECTIVE To identify the chemical components of bile acids from bear bile powder, the intermediate of bear bile powder and Tanreqing capsules by HPLC-MS/MS. METHODS All samples were extracted with 70% methanol(V/V), and an Ultimate XB C₁₈ column (4.6 mm??250 mm, 5 ??m) was employed for separation with acetonitrile-0.1% formic acid as mobile phase in gradient elution. The MS spectrum was acquired in both positive and negative ion mode using ESI ion source. The chemical components were identified by the second mass spectrometric pyrolysis fragments, chromatographic peak retention time and fragmentation regularity summarized from the reference standards and the available literature. RESULTS A total of 33 compounds were successfully identified or tentatively predicted, and six chemical compounds including tauroursodeoxycholic acid, taurochenodeoxycholic acid, ursodeoxycholic acid, chenodeoxycholic acid, 7??-hydroxy-3-oxo-5??-cholanic acid and one unknown constituent were finally transferred to Tanreqing capsules through the intermediate of bear bile powder. Moreover, 21 new chemical compounds (major ingredients of free bile acids) were generated during the production process of the intermediate, and 19 components were also detected in Tanreqing capsules. CONCLUSION The investigation of the change of constituents in bear bile powder during Tanreqing capsules production provides a basis for the quality control and evaluation of Tanreqing capsules during production process.     

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??OBJECTIVE To analyze the differences in chemical composition of Magnolia officinalis var. biloba Rehd. et Wils from different commercial specifications. METHODS The difference in chemical constituents of Magnolia officinalis var. biloba Rehd. et Wils from different commercial specifications was analyzed by LC-Triple TOF MS/MS combined with multivariate statistical analysis. Through analysis of the multistage tandem mass spectrometry, the characteristic peaks were extracted with mass spectrometry data peak matching, peak alignment, and noise filtering. Principal component analysis(PCA)and partial least-squares discriminant analysis(PLS-DA)were used for data processing. The components were identified according to MS accurate mass and MS/MS spectrometry fragmentation information, combined with the database search and literature. RESULTS The chemical constituents in Magnolia officinalis var. biloba Rehd. et Wils from different commercial specifications were clearly distinguished. Twenty-two chemical constituents had significant differences. Among them, 10 kinds of common different chemical constituents, such as leonoside A, syringaresinol-4'-O-??-D-glucopyranoside, magnolignan D, magnolignan A or C, randaiol, honokiol, obovatol, magnolignan G,(??)9-HODE and piperitylmagnolol, presented different changing laws. CONCLUSION This study can provide references for establishment of a mathematical model for prediction of the specifications of chemical information of Magnoliae Officinalis Cortex based on metabolomics and comprehensive evaluation of the quality of medicinal herbs.     

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??OBJECTIVE To qualitatively analyze the major chemical constituents of Magnoliae Officinalis Cortex by UFLC-Triple TOF-MS/MS. METHODS The analysis was carried out on an Agilent ZORBAX SB-C₁₈ column(4.6 mm ??250 mm,5 ??m)with gradient elution of 0.1% formic acid-acetonitrile under both positive and negative ionization modes of ESI, respectively. The chemical components of Magnoliae Officinalis Cortex were identified by analyzing the accurate mass of molecular and product ions provided by UFLC-Triple TOF-MS/MS, comparison with reference standards and the literature data. RESULTS A total of 24 compounds were identified or tentative presumed in Magnolia Officinalis Cortex, including 12 lignans, 9 alkaloids, and 3 phenylpropanoid glycosides. CONCLUSION This study provides the foundation and support for study on material foundation of efficacy and the overall assessment of quality of Magnoliae Officinalis Cortex.     

绵马贯众中新间苯三酚类化合物

目的 研究药材绵马贯众中间苯三酚类化学成分.方法 采用大孔吸附树脂富集(体积分数为10％乙醇、30％乙醇、50％乙醇、70％乙醇和95％乙醇等依次洗脱),以及制备C18柱色谱(色谱柱:49 mm×460 mm,分别用体积分数10％甲醇、20％甲醇水、30％甲醇、50％甲醇、70％甲醇和100％甲醇依次洗脱)、凝胶柱色谱...     

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??OBJECTIVE To establish an HPLC-MS/MS method to identify the unknown impurities in polymyxin B sulfate. METHODS The analysis was performed on Agilent 1260-6550 Q/TOF-MS with a Diamonsil Plus C₁₈ column(4.6 mm??250 mm, 5 ??m). Mobile phase A was 0.01 mol??L^-1 trifluoroacetic acid-acetonitrile(95??5), and mobile phase B was acetonitrile containing 0.1% formic acid. Mobile phase A and B were set at the volume ratio of 79??21 at a flow rate of 1 mL??min^-1 under isocratic elution. The detection wavelength was set at 254 nm. ESI source was used. Positive ion scanning was conducted in the range of m/z 50-1 700 for MS and MS/MS. The unknown components were identified by comparing the MS and MS/MS with the known reference standards like polymyxin B₁ and B₂. The photochemical Paterno-B??chi reaction was performed using a low-pressure mercury lamp as the light source at emission wavelength of 254 nm with acetone/water(50/50, V/V) as the reaction solvent. RESULTS The structures of seven unknown related substances in polymyxin B sulfate were identified. The most abundant impurity was identified to be vinyl polymyxin B₁, for which the double bond was at the end of the fatty acyl residue. CONCLUSION Vinyl polymyxin B₁ is reported for the first time. The method provides a good idea for the identification of related substances in drugs.     

基于UPLC-QTOF-MS结合多元统计的不同干燥方法白术中化学成分差异分析

目的 建立超高效液相色谱-四极杆飞行时间质谱联用技术(UPLC-QTOF-MS)结合多元统计分析技术的分析方法,比较不同干燥方法对白术中化学成分的影响。方法 采用UPLC-QTOF MS进行分析,对采集的图谱进行峰匹配、峰对齐、滤噪处理等进行特征峰提取,分别采用热图聚类分析、主成分分析(PCA)和偏最小二乘法-判别分析(PLS-DA) 对数据进行分析。结果 不同干燥白术样品在PCA轴上呈逐步变化的趋势,能有效的区分,与热图的Pearson聚类结果一致,分类结果较为理想;建立的PLS-DA模型结果较好,各样品中化学成分差异明显,根据一级质谱精确质荷比和二级质谱碎片信息,结合软件数据库搜索及相关文献进行成分鉴定,初步鉴定出34种化学成分,并筛选出白术内酯I、苍术醇、白术内酯Ⅱ、芹烷二烯酮、苯乙酸对羟基苯乙酯、白术内酯I(同分异构)、呋喃倍半萜、白术内酯Ⅳ、绿原酸、白术内酯Ⅲ这10种区分不同干燥方法的特征性成分,并呈现出不同的变化规律。结论 本研究成果为揭示不同干燥方法对白术代谢产物的影响规律及探讨白术药材的品质形成机制提供基础资料。