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。

简介：AristolochiaeFructus,aChineseherbalmedicinederivedfromthefruitofAristolochiacontortaBge.,containsnephrotoxicaristolochicacidanalogues(AAAs).Accordingtoancientmedicaltexts,variousmedicinalpartsofthefruitofA.contortawereeverused.Inordertorevealwhichpartcouldbesafelyandeffectivelyused,itisnecessarytoanalyzethechemicalprofilesofdifferentmedicinalparts.HereinwecomparedthechemicalcompositionsanddeterminedaristolochicacidI(AA-I)andaristolochicacidII(AA-II)inthefourpartsviz.outerpericarp,innerpericarp,septum,andseed.Ultra-highperformanceliquidchromatographyequippedwithquadrupoletime-of-flightmassspectrometry(UHPLC-QTOF-MS)wasappliedforchemicalprofiling.Ultra-highperformanceliquidcoupledwithtriplequadrupolemassspectrometry(UHPLC-QqQ-MS)wasemployedtoquantifyAA-IandAA-IIindifferentparts.Itwasfoundthatthechemicalcompositionsofthefourpartsvariedbothqualitativelyandquantitatively.Atotalof10AAAs,including5aristolochicacidsand5aristolactams,togetherwith3alkaloids,wereunambiguouslyortentativelyidentifiedbyUHPLC-QTOF-MS.ThequantitativelyanalyticalresultsobtainedbyUHPLC-QqQ-MSshowedthatAA-IandAA-IIexclusivelyaccumulateintheseedsofA.contorta.Thesefindingsprovidesupportingdatafortherationalselectionofmedicinalparts.

简介：ThefruitsofPaulowniacatalpifoliaGongTongareusedasaChinesefolkherbalmedicineforthetreatmentofenteritis,tonsillitis,bronchitis,anddysentery,etc.OurpreviousstudyhasidentifiednewC-geranylatedflavanoneswithobviousanti-proliferativeeffectsinlungcancerA549cells.Inthepresentstudy,anewC-geranylatedflavone,paucatalinoneC(1)andfiveknownC-geranylatedflavanones(2-6)wereisolated.Inaddition,atotalof34C-geranylatedflavonoidsweredetectedbyHPLC-DAD-ESI-MS/MScouplingtechniquesfromtheCH_2Cl_2extractofP.catalpifolia.Futhermore,anti-agingeffectsofisolatedcompoundswereevaluatedinvitrowithprematuresenescent2BScellsinducedbyH_2O_2.PhytochemicalresultsindicatedthatP.catalpifoliawasanaturalresourceofabundantC-geranylatedflavonoids.Diplacone(3)andpaucatalinoneA(5)werethepotentanti-agingagentsintheprematuresenescent2BScellsinducedbyH_2O_2andtheC-geranylsubstituentmaybeanimportantfactorbecauseofitslipophiliccharacter.

简介：目的：采用固相微萃取（SPME）-GC/MS联用技术分析天名精全草挥发油化学成分。方法：通过4个不同的SPME萃取头（DVB/PDMS、CAR/PDMS、PDMS和PA），在最佳条件下，对挥发油进行了化学成分研究。结果：总共检测出135个挥发油化学成分，DVB/PDMS、CAR/PDMS、PDMS和PA4种萃取头分别检测出88、77、56和42个挥发性成分。其中，酯类和倍半萜类化合物是天名精挥发油中主要的化学成分类型。结论：SPME-GC/MS技术可快速分析天名精全草挥发油化合物的类型以及相对含量，对天名精的进一步研究具有一定指导意义。

简介：目的：采用UPLC/Q-TOF-MS技术对玫瑰花渣中的黄酮类成分进行定性分析。方法：采用WatersBEHC18色谱柱（100mm×2.1mm,1.7μm）,柱温：40℃,洗脱系统为乙腈-0.1%甲酸水梯度洗脱;采用ESI离子源并在负离子模式下进行采集数据。结果：通过UPLC的快速分离,根据质谱数据并结合文献分析推测,鉴定了11种黄酮类化合物。结论：采用UPLC/Q-TOF-MS技术,可有效地分析玫瑰花渣中黄酮类成分,为玫瑰花渣的回收利用提供了数据支持。