简介：AIM:ToestablishamethodtosimultaneouslydeterminethemainfivealkaloidsofCatharanthusroseusfortracesamples,ahigh-performanceliquidchromatography–electrosprayionization-tandemmassspectrometry(HPLC-ESI-MS/MS)analysismethodwasdeveloped.METHOD:ThefiveCatharanthusalkaloids,vinblastine,vincristine,vinleurosine,vindoline,andcatharanthinewerechromatographicallyseparatedonaC18HPLCcolumn.Themobilephasewasmethanol-15nmol?L–1ammoniumacetatecontaining0.02%formicacid(65:35,V/V).ThequantificationofthesealkaloidswasbasedontheMultipleReactionMonitoring(MRM)mode.RESULTS:Thismethodwasvalidated,andtheresultsachievedtheaimsofthestudy.Theintra-andinter-dayprecisionandaccuracyofthefivealkaloidswerewithin1.2%-11.5%(RSD%)and-10.9%-10.5%(RE%).Therecoveryratesofthefivealkaloidsofsampleswerefrom79.9%to91.5%.Thefiveanalyteswerestableatroomtemperaturefor2h,at4°Cfor12h,andat-20°Cfortwoweeks.ThedevelopedmethodwasappliedsuccessfullytodeterminethecontentofthefivealkaloidsinthreeplantpartsofthreebatchesofC.roseuswithaminuteamountcollectedfromthreeregionsofChina.CONCLUSION:TheHPLC-ESI-MS/MSmethodcanbeusedforthesimultaneousdeterminationoffiveimportantalkaloidsintraceC.roseussamples.

简介：目的：为浮萍质量标准的建立与资源的综合开发利用提供科学依据.方法：采用微波消解-ICP-AES法测定不同产地浮萍中无机元素含量,用聚类分析法对其所含元素进行分析和评价.结果：不同产地浮萍中含有19～23种无机元素,其中B,Co,Cr,Cu,Fe,Mn,Mo,Ni,Zn9种为人体必需微量元素,Ca,P,K,Mg和Na等5种为人体必需宏量元素.结论：多种元素与浮萍药理活性存在密切的联系,具有一定的研究价值,浮萍对有毒重金属元素的治理和水环境的保护具有一定的发展前景.