Access to security and safe food is a basic human necessity and essential for a sustainable world. To perform hi-end rood safety analysis and risk assessment with state of the art technologies is of utmost importance ...Access to security and safe food is a basic human necessity and essential for a sustainable world. To perform hi-end rood safety analysis and risk assessment with state of the art technologies is of utmost importance thereof. With applications as exemplified by microfiuidic immunoassay, aptasensor, direct analysis in real time, high resolution mass spectrometry, benchmark dose and chemical specific adjustment factor, this review presents frontier food safety analysis and risk assessment technologies, from which both food quality and public health will benefit undoubtedly in a foreseeable future.展开更多
Ambient mass spectrometry facilitates surface detection under ambient conditions and has quickly found its applications in various areas.However,the sensitivity of AMS methods is usually not as good as that of encapsu...Ambient mass spectrometry facilitates surface detection under ambient conditions and has quickly found its applications in various areas.However,the sensitivity of AMS methods is usually not as good as that of encapsulated ion sources due to less efficient ion transmission.In this work,a briefly machined external ion funnel(threepole electrostatic lens)was adopted and installed between direct analysis in real time and the mass spectrometer inlet to increase detection sensitivity.Software investigation with SIMION version 8.0 was employed to calculate electric fields and to simulate the trajectories of charged particles in the electric field.Both the geometrical parameters of the ion funnel and the electric parameters were studied to obtain the optimal ion focusing results,which demonstrated the ion funnel equipment would greatly improve the ion transmission efficiency.The equipment showed good prospect in direct analysis in real time-mass spectrometry analysis in the future.展开更多
A method for rapid identification and quantification of phthalate plasticizers in beverages was developed.A number of 15 phthalate plasticizers which covered all the phthalates concerned in the US Consumer Product Saf...A method for rapid identification and quantification of phthalate plasticizers in beverages was developed.A number of 15 phthalate plasticizers which covered all the phthalates concerned in the US Consumer Product Safety Improvement Act(CPSIA),European Union legislations and Chinese national standards(GB)were analyzed.By a combined solid-phase micro-extraction(SPME)and direct analysis in real time mass spectrometry(DART-MS)approach,phthalates at sub-ng•mL^(−1)levels can be qualitatively and quantitatively analyzed in a short time.The use of ultrahigh-resolving power and the accurate mass measurement capacity naturally provided by Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR-MS)minimizes the matrix interferences and thus enables the evaluation of phthalates in a complex matrix without extensive sample handlings or preparations.The limits of quantification(LOQs)were estimated to be at 0.3-5.0 ng•mL^(−1),lower than the Maximum Residue Limit(MRL)regulated by the European Union legislations(2007/19/EC)in foods,beverages,food packaging and toys(0.3-30 ng•mL^(−1)).This rapid and easy-to-use SPME-DART-FT-ICR-MS method provided a relatively high-throughput and powerful analytical approach for quick testing and screening phthalates in beverages and water samples to ensure food safety.展开更多
We aimed to establish for the rapid detection of morphine,O6‑monoacetylmorphine,heroin,codeine,cocaine,methamphetamine,ketamine,methadone,and dolantin in human blood and urine by direct analysis in real‑time coupled w...We aimed to establish for the rapid detection of morphine,O6‑monoacetylmorphine,heroin,codeine,cocaine,methamphetamine,ketamine,methadone,and dolantin in human blood and urine by direct analysis in real‑time coupled with tandem mass spectrometry(DART‑MS/MS).These samples were extracted by acetonitrile‑methanol(V/V=4:1),using DART 12 Dip‑it automatic sampling system.They were injected at 400℃,and analyzed by positive ion and multiple reaction monitoring mode.The detection limits of morphine,O6‑Monoacetylmorphine,heroin,codeine,cocaine,methamphetamine,ketamine,methadone,and dolantin were 100,50,50,100,20,20,10,1,and 0.01 ng/mL,respectively.The practical cases contained methamphetamine,codeine,cocaine,and O6‑monoacetylmorphine were detected accurately and rapidly.The method has the advantages of high sensitivity and good accuracy.The sample processing is simple and can be analyzed in a short time.This method is suitable for the analysis of morphine,O6‑monoacetylmorphine,heroin,codeine,cocaine,methamphetamine,ketamine,methadone,and dolantin in some practical cases.展开更多
生物胺是一类有毒有害的含氮化合物,存在于发酵食品中。目前检测生物胺的方法存在前处理复杂繁琐、耗时长等问题。该文通过实时直接分析离子源与三重四极杆质谱联用技术建立快速检测白酒中生物胺的外标定量方法,对实时直接分析(direct a...生物胺是一类有毒有害的含氮化合物,存在于发酵食品中。目前检测生物胺的方法存在前处理复杂繁琐、耗时长等问题。该文通过实时直接分析离子源与三重四极杆质谱联用技术建立快速检测白酒中生物胺的外标定量方法,对实时直接分析(direct analysis in real time,DART)参数、进样速度、采样模式和溶剂进行优化,测定的生物胺包括腐胺(putrescine,PUT)、组胺(histamine,HIS)、尸胺(cadaverine,CAD)、酪胺(tyramine,TYR)和色胺(tryptamine,TRP)。结果表明,400℃为DART源的最优工作温度,进样速度为1 mm/s时,生物胺色谱峰峰形尖锐且峰间距适宜。使用Quick Strip采样模式分析物的相对标准偏差低于20%,生物胺回归系数(R^(2))大于0.99,方法检出限为8.60~38.00μg/L,定量限为28.75~126.50μg/L。该方法是一种现场、无损、快速、低碳、原位、直接分析的方法,适用于白酒中生物胺的快速筛查评估,操作上极大地满足了白酒行业对质量安全控制和风险评估的需求。展开更多
目的:在未经前处理和色谱分离的情况下应用实时直接分析-串联质谱法检测吐根生物碱。方法:在优化的条件下全扫描采集药材,茎及叶的DART-MS(direct analysis in real time,DART)特征图谱,并对生物碱进行二级质谱确证,采用多反应监测模式...目的:在未经前处理和色谱分离的情况下应用实时直接分析-串联质谱法检测吐根生物碱。方法:在优化的条件下全扫描采集药材,茎及叶的DART-MS(direct analysis in real time,DART)特征图谱,并对生物碱进行二级质谱确证,采用多反应监测模式通过测定样品表面待测物的质谱峰强度来计算其在样品中的平均含量。结果:药材和茎的图谱中均有明显的吐根碱和吐根酚碱的质子化离子峰m/z 481,467,叶中m/z 479,465为其他生物碱的质子化离子峰,定量方法的重复性和线性良好。结论:该模式或在药材、饮片的快速鉴别及实时对中间体或成品的快速定量分析中发挥作用。展开更多
基金financially supported by the Beijing Municipal Science and Technology Project, China (Z131110000613066)the Educational and Teaching Reform Project for Graduate Students, China (G-JG-XJ201408)the Beijing Key Laboratory of Bioprocess, China
文摘Access to security and safe food is a basic human necessity and essential for a sustainable world. To perform hi-end rood safety analysis and risk assessment with state of the art technologies is of utmost importance thereof. With applications as exemplified by microfiuidic immunoassay, aptasensor, direct analysis in real time, high resolution mass spectrometry, benchmark dose and chemical specific adjustment factor, this review presents frontier food safety analysis and risk assessment technologies, from which both food quality and public health will benefit undoubtedly in a foreseeable future.
基金This work was financially supported by the National Natural Science Foundation of China(Grant Nos.21275012 and 21175008).
文摘Ambient mass spectrometry facilitates surface detection under ambient conditions and has quickly found its applications in various areas.However,the sensitivity of AMS methods is usually not as good as that of encapsulated ion sources due to less efficient ion transmission.In this work,a briefly machined external ion funnel(threepole electrostatic lens)was adopted and installed between direct analysis in real time and the mass spectrometer inlet to increase detection sensitivity.Software investigation with SIMION version 8.0 was employed to calculate electric fields and to simulate the trajectories of charged particles in the electric field.Both the geometrical parameters of the ion funnel and the electric parameters were studied to obtain the optimal ion focusing results,which demonstrated the ion funnel equipment would greatly improve the ion transmission efficiency.The equipment showed good prospect in direct analysis in real time-mass spectrometry analysis in the future.
基金support from National Natural Science Foundation of China(Nos.21172250 and 21275155).
文摘A method for rapid identification and quantification of phthalate plasticizers in beverages was developed.A number of 15 phthalate plasticizers which covered all the phthalates concerned in the US Consumer Product Safety Improvement Act(CPSIA),European Union legislations and Chinese national standards(GB)were analyzed.By a combined solid-phase micro-extraction(SPME)and direct analysis in real time mass spectrometry(DART-MS)approach,phthalates at sub-ng•mL^(−1)levels can be qualitatively and quantitatively analyzed in a short time.The use of ultrahigh-resolving power and the accurate mass measurement capacity naturally provided by Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR-MS)minimizes the matrix interferences and thus enables the evaluation of phthalates in a complex matrix without extensive sample handlings or preparations.The limits of quantification(LOQs)were estimated to be at 0.3-5.0 ng•mL^(−1),lower than the Maximum Residue Limit(MRL)regulated by the European Union legislations(2007/19/EC)in foods,beverages,food packaging and toys(0.3-30 ng•mL^(−1)).This rapid and easy-to-use SPME-DART-FT-ICR-MS method provided a relatively high-throughput and powerful analytical approach for quick testing and screening phthalates in beverages and water samples to ensure food safety.
基金This research was supported by the Project for Strengthening the Police Force with Science and Technology(project number 2018GABJC29).
文摘We aimed to establish for the rapid detection of morphine,O6‑monoacetylmorphine,heroin,codeine,cocaine,methamphetamine,ketamine,methadone,and dolantin in human blood and urine by direct analysis in real‑time coupled with tandem mass spectrometry(DART‑MS/MS).These samples were extracted by acetonitrile‑methanol(V/V=4:1),using DART 12 Dip‑it automatic sampling system.They were injected at 400℃,and analyzed by positive ion and multiple reaction monitoring mode.The detection limits of morphine,O6‑Monoacetylmorphine,heroin,codeine,cocaine,methamphetamine,ketamine,methadone,and dolantin were 100,50,50,100,20,20,10,1,and 0.01 ng/mL,respectively.The practical cases contained methamphetamine,codeine,cocaine,and O6‑monoacetylmorphine were detected accurately and rapidly.The method has the advantages of high sensitivity and good accuracy.The sample processing is simple and can be analyzed in a short time.This method is suitable for the analysis of morphine,O6‑monoacetylmorphine,heroin,codeine,cocaine,methamphetamine,ketamine,methadone,and dolantin in some practical cases.
文摘生物胺是一类有毒有害的含氮化合物,存在于发酵食品中。目前检测生物胺的方法存在前处理复杂繁琐、耗时长等问题。该文通过实时直接分析离子源与三重四极杆质谱联用技术建立快速检测白酒中生物胺的外标定量方法,对实时直接分析(direct analysis in real time,DART)参数、进样速度、采样模式和溶剂进行优化,测定的生物胺包括腐胺(putrescine,PUT)、组胺(histamine,HIS)、尸胺(cadaverine,CAD)、酪胺(tyramine,TYR)和色胺(tryptamine,TRP)。结果表明,400℃为DART源的最优工作温度,进样速度为1 mm/s时,生物胺色谱峰峰形尖锐且峰间距适宜。使用Quick Strip采样模式分析物的相对标准偏差低于20%,生物胺回归系数(R^(2))大于0.99,方法检出限为8.60~38.00μg/L,定量限为28.75~126.50μg/L。该方法是一种现场、无损、快速、低碳、原位、直接分析的方法,适用于白酒中生物胺的快速筛查评估,操作上极大地满足了白酒行业对质量安全控制和风险评估的需求。
文摘目的:在未经前处理和色谱分离的情况下应用实时直接分析-串联质谱法检测吐根生物碱。方法:在优化的条件下全扫描采集药材,茎及叶的DART-MS(direct analysis in real time,DART)特征图谱,并对生物碱进行二级质谱确证,采用多反应监测模式通过测定样品表面待测物的质谱峰强度来计算其在样品中的平均含量。结果:药材和茎的图谱中均有明显的吐根碱和吐根酚碱的质子化离子峰m/z 481,467,叶中m/z 479,465为其他生物碱的质子化离子峰,定量方法的重复性和线性良好。结论:该模式或在药材、饮片的快速鉴别及实时对中间体或成品的快速定量分析中发挥作用。
