目的基于线性离子阱质谱的多重反应监测-信息依赖采集-增强子离子扫描(multiple reaction monitoring-information dependent acquisition-enhanced product ion scan,MRM-IDA-EPI)二级谱图筛查方法,建立超高效液相色谱-串联质谱法(ultr...目的基于线性离子阱质谱的多重反应监测-信息依赖采集-增强子离子扫描(multiple reaction monitoring-information dependent acquisition-enhanced product ion scan,MRM-IDA-EPI)二级谱图筛查方法,建立超高效液相色谱-串联质谱法(ultra performance liquid chromatography-tandem mass spectrometry,UPLC-MS/MS)定量检测和定性筛查野生菌中15种蘑菇毒素。方法野生菌样本通过甲酸-甲醇-水-乙腈(1:40:40:19,V:V:V:V)混合溶液超声提取,QuEChERS试剂提取净化,采用UPLC-MS/MS和MRM-IDA-EPI方法对15种蘑菇毒素进行定量分析和定性筛查。结果通过野生菌样本前处理方法和色谱条件优化,对15种蘑菇毒素进行0.04、0.10和0.40 mg/kg三水平加标回收实验,方法准确度为76.6%~109.2%,精密度为0.3%~7.6%;15种蘑菇毒素的线性范围为10~1000μg/L,线性相关系数(r)在0.9980~0.9994之间;其中α-鹅膏毒肽、β-鹅膏毒肽、γ-鹅膏毒肽、光盖伞素和鹅膏蕈氨酸的方法检出限(limits of detection,LODs)和定量限(limits of quantification,LOQs)分别为10μg/kg和30μg/kg,二羟鬼笔毒肽、羧基二羟鬼笔毒肽、羧基三羟鬼笔毒肽、毒蝇碱、蝇蕈醇、甲基裸盖菇素、鹿花菌素、脱磷酸裸盖菇素、奥来毒素和鬼伞菌素的LODs和LOQs分别为20μg/kg和60μg/kg,采用QuEChERS前处理方法对野生菌样本进行处理,样本基质效应系数K值在0.91~1.08之间。结论所建立的野生菌样本前处理方法对15种蘑菇毒素的定量测定无基质干扰,15种蘑菇毒素的UPLC-MS/MS和MRM-IDA-EPI分析方法结果准确、重现性好、灵敏度高,该方法适用于有毒野生菌引起的食源性中毒定量分析和定性筛查。展开更多
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...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。展开更多
Although rare,death from amanitin exposure poses a significant health risk and a diagnostic challenge to the clinician due to its rarity.This is one of the few conditions to be voluntarily reported by healthcare profe...Although rare,death from amanitin exposure poses a significant health risk and a diagnostic challenge to the clinician due to its rarity.This is one of the few conditions to be voluntarily reported by healthcare professionals.No antidote exists for this poisoning and,perhaps due to its rarity or lack of attention,the United States has lagged behind Europe for almost three decades in treatment,diagnostics and experimentation.This regrettable fact warrants the formation of a centralized agency for education,the advancement of research and the collection of data,to provide better treatment for the population.展开更多
文摘目的基于线性离子阱质谱的多重反应监测-信息依赖采集-增强子离子扫描(multiple reaction monitoring-information dependent acquisition-enhanced product ion scan,MRM-IDA-EPI)二级谱图筛查方法,建立超高效液相色谱-串联质谱法(ultra performance liquid chromatography-tandem mass spectrometry,UPLC-MS/MS)定量检测和定性筛查野生菌中15种蘑菇毒素。方法野生菌样本通过甲酸-甲醇-水-乙腈(1:40:40:19,V:V:V:V)混合溶液超声提取,QuEChERS试剂提取净化,采用UPLC-MS/MS和MRM-IDA-EPI方法对15种蘑菇毒素进行定量分析和定性筛查。结果通过野生菌样本前处理方法和色谱条件优化,对15种蘑菇毒素进行0.04、0.10和0.40 mg/kg三水平加标回收实验,方法准确度为76.6%~109.2%,精密度为0.3%~7.6%;15种蘑菇毒素的线性范围为10~1000μg/L,线性相关系数(r)在0.9980~0.9994之间;其中α-鹅膏毒肽、β-鹅膏毒肽、γ-鹅膏毒肽、光盖伞素和鹅膏蕈氨酸的方法检出限(limits of detection,LODs)和定量限(limits of quantification,LOQs)分别为10μg/kg和30μg/kg,二羟鬼笔毒肽、羧基二羟鬼笔毒肽、羧基三羟鬼笔毒肽、毒蝇碱、蝇蕈醇、甲基裸盖菇素、鹿花菌素、脱磷酸裸盖菇素、奥来毒素和鬼伞菌素的LODs和LOQs分别为20μg/kg和60μg/kg,采用QuEChERS前处理方法对野生菌样本进行处理,样本基质效应系数K值在0.91~1.08之间。结论所建立的野生菌样本前处理方法对15种蘑菇毒素的定量测定无基质干扰,15种蘑菇毒素的UPLC-MS/MS和MRM-IDA-EPI分析方法结果准确、重现性好、灵敏度高,该方法适用于有毒野生菌引起的食源性中毒定量分析和定性筛查。
文摘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。
文摘Although rare,death from amanitin exposure poses a significant health risk and a diagnostic challenge to the clinician due to its rarity.This is one of the few conditions to be voluntarily reported by healthcare professionals.No antidote exists for this poisoning and,perhaps due to its rarity or lack of attention,the United States has lagged behind Europe for almost three decades in treatment,diagnostics and experimentation.This regrettable fact warrants the formation of a centralized agency for education,the advancement of research and the collection of data,to provide better treatment for the population.