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500 个结果
  • 简介:摘要:目的:建立一个用液相色谱-质谱联用法测定中药材中黄曲霉毒素含量的方法。方法:色谱柱:thermo Scientific Hypersll GOLDTM(1.9μm,2.1×100mm);流动相: 乙腈-10mmol/L的甲酸铵水溶液,梯度洗脱;流量: 0.3 ml/min;以三重四极杆串联质谱仪检测;柱温:25 ℃。结果:根据药材基质的不同,优化得出相应满足方法要求的前处理方法并进行了验证。结论:该方法可用于中药材中黄曲霉毒素含量的测定。

  • 标签: 黄曲霉毒素 HPLC-MS/MS 方法确认
  • 简介:摘要:目的 采用超高液相色谱配备三重四级杆质谱仪(UPLC-MS/MS)法测定阿那曲唑中痕量杂质偶氮二异丁腈(azodiisobutyronitrile,AIBN)的含量。方法 采用 HICHROM RPB X608色谱柱(3.2mm×100mm,5μm),梯度洗脱,流动相A为甲酸-水(0.2:100,v/v),B为甲酸-甲醇(0.2:100,v/v),(0—0.80min,B 20%—40%;0.80—4.00min,B 40%;4.00—4.10min,B 40%—20%;4.10—5.00min,B 20%),流速1.0 mL·min ,进样量10μL,采用电喷雾离子源(ESI),在正离子模式下选择 m/z 69的分子离子进行检测。结果 AIBN 浓度在6.017~601.6ng·mL 内与峰面积线性关系良好(r=1.000);检测限为1.805ng·mL ,定量限为6.017ng·mL ,样品中杂质 AIBN 测定结果的重复性良好,RSD(n=6)为2.1%;杂质AIBN低、中、高浓度的加样回收率分别为97.3%,96.2%,97.5%,RSD(n=9)为1.71%。经检测,阿那曲唑供试品中AIBN未检出。结论 本方法专属性强,结果准确,灵敏度高,可用于阿那曲唑原料药中AIBN的检测。

  • 标签: 阿那曲唑 偶氮二异丁腈(AIBN) UPLC-MS/MS 基因毒性杂质
  • 简介:摘 要:本文建立了一种通过UPLC-MS/MS测定定西宽粉中米酵菌酸含量的快速检测方法。样品经甲醇-氨水溶液提取后,过0.22µm有机滤膜,上UPLC-MS/MS测定。结果表明,米酵菌酸的质量浓度在1~100ng/mL范围内与色谱峰面积的线性关系良好,R 为0.9996,检出限1.0µg/kg。RSD小于5%(n=6),加标回收率在60%-120%之间。该方法处理样品简单、快捷、检出限低、精密度高,定性、定量准确。

  • 标签: UPLC-MS/MS 米酵菌酸 分析     
  • 简介:摘要:随着近几年来我国社会各方面的建设发展,科学水平的高速发展正在逐渐开始促进现如今我国社会各行各业的创新进步与发展,并且现代人民群众的生活水平与质量日益提升,对于生活中所面临的诸多方面要求也逐渐开始有所提高,比如人们的衣食住行等问题,在现代经济富足的环境影响下,人们更加重视起食品的安全性来,并且现代食品中经常会发现较多的有害化合物与添加剂,对现代人民群众的健康造成了严重的威胁。基于此,将LC-MS/MS技术应用于食品质量与安全研究中,对现代我国社会食品安全方面的问题做出保障。

  • 标签: 食品质量 安全研究 LC-MS/MS技术
  • 简介:摘要:在当今快速发展的制药行业中,确保药物产品的安全性、有效性和一致性是核心要务。随着科学技术的进步,超高效液相色谱技术的引入,为药物质量控制和过程分析带来了革命性的变革。UHPLC凭借其卓越的分离效能、超高的灵敏度和分析速度,成为制药过程中不可或缺的分析工具。本文旨在深入探讨UHPLC在药物制造环节中的应用策略,如何在提升药物质量的同时,优化生产过程,实现从原料监控到成品放行的全程质量管理升级。

  • 标签: UHPLC 制药 质量控制
  • 简介:目的运用高效液相色谱-高分辨飞行时间质谱联用(HPLC-TOF-MS)技术和高效液相色谱串联三重四级杆质谱(HPLC-MS/MS)法,对产复康颗粒化学成分进行快速鉴定及定量分析,并进行初步药动学研究。方法HPLC-TOF-MS法采用ZORBAXEclipsePlusC18(100mm×3.0mm,1.8μm)色谱柱;流动相为乙腈(A)-0.1%甲酸水(B),梯度洗脱,体积流量0.2mL/min;质谱采用正、负离子扫描,扫描范围m/z100~2000。HPLC-MS/MS法采用WatersXBridge?BEHC18(150mm×4.6mm,2.5μm)色谱柱;流动相为乙腈(A)-0.1%甲酸水(B),梯度洗脱,体积流量0.4mL/min;ScheduledMRM正负离子切换监测模式定量分析。ig给予SD大鼠产复康颗粒(0.5、5g/kg),给药后于不同时间点颈静脉取血0.2mL,分离血浆,HPLC-MS/MS法检测产复康颗粒入血成分及含量。结果HPLC-TOF-MS法鉴定产复康颗粒中24种成分;建立的HPLC-MS/MS方法分离度良好,各方法学验证均符合要求,对13种主要成分进行定量分析,水苏碱、黄芪甲苷和益母草碱的含量较高,可能是其主要活性成分;药动学结果显示,仅在给药剂量5g/kg时,血浆中可检测到水苏碱和益母草碱,水苏碱的消除较慢,益母草碱快速消除。结论该方法简便、准确,重复性好,可用于产复康颗粒中多种成分的鉴定和含量的测定,为药材的质量控制、药动学研究提供了参考。

  • 标签: 产复康颗粒 HPLC-TOF-MS 化学成分 HPLC-MS/MS 定量分析 药动学
  • 简介:AbstractBackground:The human brain is the most complex organ in the body, and it is important to have a better understanding of how the protein composition in the brain regions contributes to the pathogenesis of associated neurological disorders.Methods:In this study, a comparative analysis of the frontal and temporal cortex proteomes was conducted by isobaric tags of relative and absolute quantification (iTRAQ) labeling and two-dimensional liquid chromatography-tandem mass spectrometry (2D LC-MS/MS). Brain protein was taken from relatively normal tissue that could not be avoided of damage during emergent surgery of the TBI (traumatic brain injury) patients admitted in Beijing Tiantan Hospital from 2014 to 2017. Eight cases were included. Four frontal lobes and 4 temporal lobes proteome were analyzed and the proteins were quantitated. Gene Ontology (GO), Ingenuity Pathway Analysis (IPA), and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were used to analyze the biological function of identified proteins, unchanged proteins, and differentially expressed proteins (DEPs).Results:A total number of 2127 protein groups were identified in the frontal and temporal lobe proteomes. A total of 1709 proteins could be quantitated in both the frontal and temporal cortex. Among 90 DEPs, 14 proteins were screened highly expressed in the temporal cortex, including MAPT, SNCG, ATP5IF1, GAP43, HSPE1, STMN1, NDUFS6, LDHB, SNCB, NDUFA7, MRPS36, EPDR1, CISD1, and RALA. In addition, compared to proteins expressed in the frontal cortex, 14 proteins including EDC4, NIT2, VWF, ASTN1, TGM2, SSB, CLU, HBA1, STOM, CRP, LRG1, SAA2, S100A4, and VTN were a low expression in the temporal cortex. The biological process enrichment showed that unchanged proteins between the frontal and temporal cortex mainly take part in regulated exocytosis, axon guidance, and vesicle-mediated transport. The KEGG pathway analysis showed that unchanged proteins between the frontal and temporal cortex mainly take part in oxidative phosphorylation, carbon metabolism, Huntington's disease, and Parkinson's disease.Conclusions:The majority of proteins are unchanged between the frontal and temporal cortex, and unchanged proteins are closely related to its function. Among DEPs, MATP (tau) is upregulated in the temporal cortex, closely related to Alzheimer's disease (AD), and is one of the targets for the treatment of AD. CLU is downregulated in the temporal cortex which functions as an extracellular chaperone that prevents aggregation of non-native proteins. It was suggested that the temporal lobe may not be the "functional dumb area" of the traditional view, but could be involved in important neural metabolic circuits.

  • 标签: Frontal cortex Temporal cortex iTRAQ Proteomics 2D-LC-MS/MS
  • 简介:目的:采用HPLC-MS/MS法分析鉴定罗通定在大鼠胆汁中的主要代谢产物。方法:罗通定灌胃给予大鼠(120mg·kg^-1),收集胆汁样品。色谱分离采用ZorbaxSBC18(150mm×0.5mmI.D.,5μm);流动相:甲醇-水-三乙胺(30:70:0.07,V/V/V);质谱分析采用(+)ESI模式。结果:在大鼠胆汁中观察到4个罗通定代谢产物,初步推测其中2个为罗通定去甲基化后再与硫酸结合的产物。结论:去甲基化后形成硫酸结合物为罗通定在大鼠胆汁中一主要排泄形式。

  • 标签: 罗通定 胆汁 代谢产物 HPLC-MS/MS
  • 简介:Panaxnotoginsengsaponins(PNS)arethemajorcomponentsofPanaxnotoginseng,withmultiplepharmacologicalactivitiesbutpoororalbioavailability.PNScouldbemetabolizedbygutmicrobiotainvitro,whiletheexactroleofgutmicrobiotaofPNSmetabolisminvivoremainspoorlyunderstood.Inthisstudy,pseudogerm-freeratmodelswereconstructedbyusingbroad-spectrumantibioticstovalidatethegutmicrobiota-mediatedtransformationofPNSinvivo.Moreover,ahighperformanceliquidchromatography-electrosprayionizationtandemmassspectrometry(HPLC-ESI-MS/MS)wasdevelopedforquantitativeanalysisoffourmetabolitesofPNS,includingginsenosideF1(GF1),ginsenosideRh2(GRh2),ginsenosidecompoundK(GCK)andprotopanaxatriol(PPT).Theresultsshowedthatthefourmetabolitescouldbedetectedinthecontrolratplasma,whiletheycouldnotbedeterminedinpseudogerm-freeratplasma.TheresultsimpliedthatPNScouldnotbebiotransformedeffectivelywhengutmicrobiotawasdisrupted.Inconclusion,gutmicrobiotaplaysanimportantroleinbiotransformationofPNSintometabolitesinvivo.

  • 标签: PANAX notoginseng Gut MICROBIOTA HPLC-MS/MS SAPONINS
  • 简介:目的建立血液中常见毒药物的LC-MS/MS筛选分析方法。方法采用多反应监测(MRM)模式,以目标物的保留时间和母离子/子离子对为指标进行筛选分析。建立LC-MS/MS库和定性认定准则,并考察了方法的有效性。结果多反应监测筛选体系兼具有选择高子扫描的灵敏度和二级质谱的特征性,血液中132种毒药物筛选分析的最低检出限为0.1-10ng/ml,其中83%的检出限≤1ng/ml。鉴定应用表明方法的检出率和可靠性良好。结论该筛选分析方法能满足法医毒物学和临床毒物学检测中毒或治疗目标物的需要,且能扩展至其它生物检材。

  • 标签: 毒药物 筛选分析 LC-MS/MS 多反应监测
  • 简介:采用气相色谱-质谱和串联质谱联用技术对烷基磷酸酯类化合物的质谱裂解规律进行了研究,并利用分子轨道理论计算了离子碎片的稳定性和能量,结合实验结果和理论计算,获得了具有规律性的信息和结论。

  • 标签: BI-MS EI-MS/MS 烷基磷酸酯 裂解规律
  • 简介:Inthispaper,thebasicconditionsandcharacteristicsoftheDatong-Yanggaoearthquakearedescribedindetail.Thetypeoftheearthquake,theaftershockactivity,theearthquaketrend,thecharacteristicsofdamageareanalyzedanddiscussed.Thisearthquakebelongstoasequenceofearthquakeswarmtypeandisoftheconcentratedlyoccurringcharacteristicsofseveralmainshocksinatimesequence,andtheaftershockactivitywasnormallyattenuated.Becauseoftheunreasonabledesignofbuildingsandrepeatedvibrationbyseveraldestructivemainshockswithinashortperiod,thedamageinthehighintensityregionwasaggravated.Theanalysisandthepredictionprocedureofthe1991Datong-Yanggaoearthquake(Ms=5.8)arealsobrieflygiven.

  • 标签: Datong-Yanggao Basic CHARACTERISTICS MACRO INVESTIGATION ASSESSMENT
  • 简介:摘要:近年来,视频业务、大数据、物联网、云计算、 5G等新业务的不断涌现和快速增长,对传送网络的要求越来越高。从目前来看,新兴业务的发展,对传统单一的网络形成巨大冲击,使得现有网络已然无法满足大带宽和多业务传送的需求,而 MS-OTN技术具备的多业务接入、统一交叉和统一传送的特点能有效地降低建网成本和维护成本,更好的满足持续快速增长的流量需求。本文通过 MS-OTN的系统架构来分析和研究它的关键技术。

  • 标签: MS-OTN 系统架构 大容量线卡 MPLS-TP
  • 简介:DatavideoMS-900是一款基于DATAVIDEOSE-9008通道标清切换台而集成的移动演播室产品。通过它,用户可根据自己的需求选购不同的输入/输出板卡和抠像功能。

  • 标签: 演播室 移动 SE-900 输入/输出 切换台 8通道
  • 简介:氯化汞(HgCl2,Mercuricchloride,分子量271.5)俗称升汞,为无色结晶或白色结晶性粉末,熔点277℃,在常温下有轻微挥发性,易溶于水、醇、甘油、乙醚、丙酮、乙酸乙酯等极性溶剂。氯化汞不仅是常用的分析试剂,还可以做消毒防腐剂,但是其毒性大,易于获得,因此在日常生活中自杀、误服和他杀均有案例报道。氯化汞通常被人认为是无机盐,是离子晶体,其实氯化汞为正交晶系,容易升华,

  • 标签: GC/MS 氯化汞 雷因希
  • 简介:如果硬是要让女人看足球,有梅西、贝克汉姆这样的球星就是最充分的理由。球迷们爱将自己的精力消耗在各自喜爱的球队上,顺带爱屋及乌。与球队有关的产品也跟着走红。COCOPARK购物公园的MR&MS银饰店,就联合皇马、曼联、巴萨三家全球顶级足球俱乐部,限量推出以足球文化为主题的银饰。

  • 标签: 足球俱乐部 银饰 享受 贝克汉姆 足球文化 球队
  • 简介:目的:建立超高效液相色谱三重四极杆串联质谱法(UPLC-MS/MS)同时测定不同产地吊石苣苔中4个苯乙醇苷类成分的方法,分析比较不同产地吊石苣苔中苯乙醇苷含量差异。方法:采用ACQUITYUPLCBEHC18色谱柱(100mm×2.1mm,1.8μm);以0.1%甲酸-水(A)-0.1%甲酸乙腈(B)溶液为流动相,梯度洗脱,体积流量为0.5mL·min^-1;柱温为40℃,采用电喷雾离子源,负离子检测方式,得到相应的提取离子流图。结果:不同产地吊石苣苔中4个苯乙醇苷含量有明显差异,结论:该方法操作简便、准确、重复性好,对寻找高含量苯乙醇苷的资源植物及产地具有重要的理论指导意义。

  • 标签: 吊石苣苔 苯乙醇苷 UPLC—MS/MS