摘要
建立了在线液相色谱-二极管阵列检测器-串联质谱技术(LC-DAD-MS/MS)同时测定野生菌中多肽类蘑菇毒素(鹅膏毒肽和鬼笔毒肽)的分析方法。样品经甲醇提取,水稀释后,在碱性条件下用XBridge^(TM) BEH C_(18)柱(150m m×3.0 m m,2.5μm)分离,并先后用DAD和MS/MS检测。使用碱性流动相能够实现5种多肽类蘑菇毒素在15 m in内达到基线分离,同时又能有效抑制质谱加钠峰[M+Na]^+的响应信号,保证检测的稳定性和灵敏度。5种蘑菇毒素在0.05~500 mg/kg范围内线性关系良好,相关系数(r)>0.99;检出限为0.005~0.02 mg/kg。通过实际样品检测,证明该法操作简单、快速,灵敏度高,宽的定量检测线性范围能满足实际样品中蘑菇毒素含量变化大的特点。
A fast and wide linear range method was established for the determination of mushroom toxins amanitins(a-amanitin,^S-amanitin and y-amanitin)and phallotoxins(phallacidin and phalloidin)in wild mushrooms by online liquid chromatography-diode array detectortandem mass spectrometry(LC-DAD-MS/M S).The mushroom toxins were extracted with methanol,and diluted with water.The extracts were separated on an XBridge?BEH C.column(150mmx3.0mm,2.5^m)under pH10.7,measured by DAD and then analyzed by MS/MS.Basic mobile phase conditions were applied to improve the ionization efficiency of hydrogen ion adducts.The baseline separation of the analytes was obtained within15min.The limits of detection(LODs)of the sample matrix were0.005-0.02mg/kg.The toxins were quantified by the results measured by MS/MS when the toxin contents less than2mg/k g,and quantified by the results obtained from DAD when the contents more than2mg/kg.The linear range was0.05-500mg/kg for the whole method in one injection.The method was successfully applied to the analyses of amanitins and phallotoxins in Lepiota brunneoincarnata and white Am anita.
作者
徐小民
张京顺
蔡增轩
张晶
黄百芬
许娇娇
陈苘
XU Xiaomin;ZHANG Jingshun;CAI Zengxuan;ZHANG Jing;HUANG Baifen;XU Jiaojiao;CHEN Qing(Zhejiang Provincial Center for Disease Control and Prevention,Hangzhou 310051,China)
出处
《色谱》
CAS
CSCD
北大核心
2017年第6期613-619,共7页
Chinese Journal of Chromatography
基金
浙江省医药卫生科技计划项目(2015DTA006)~~
关键词
在线液相色谱-二极管阵列检测器-串联质谱法
宽线性范围定量
蘑菇毒素
鹅膏毒肽
鬼笔毒肽
野生菌
online liquid chromatography-diode array detector-tandem mass spectrometry (LC-DAD-MS/MS)
wide linear range quantification
mushroom toxins
amanitins
phallotoxins
wild mushrooms
