A method for the rapid determination of 23 organophosphorus pesticide residues in vegetables and fruits by SIM-GC-MS is described in this paper.Analysis is performed by gas-chromatography with mass selective detector...A method for the rapid determination of 23 organophosphorus pesticide residues in vegetables and fruits by SIM-GC-MS is described in this paper.Analysis is performed by gas-chromatography with mass selective detector（GC-MS）and selected ion monitoring（SIM）mode,and pesticides are positively confirmed by retention times and characteristic ion ratios.It takes less than 27 min to detect 23 organophosphorus pesticide residues.The spiked recoveries are between 70%～113%when the added pesticides concentration is in the range of 0.01μg～1.00μg.The RSD is less than 20%.The limit of detection is 0.001μg·g-1～0.06μg·g-1.This method is suitable for the daily detection of normal laboratory.展开更多
为了探究山苍子精油中主要成分的绝对含量,建立了一种气相色谱-质谱/选择离子扫描(gas chromatography mass spectrometry/selective ion monitoring,GC-MS/SIM)方法,对其中主要成分(α-蒎烯、β-蒎烯、D-柠檬烯、1,8-桉叶素、芳樟醇、...为了探究山苍子精油中主要成分的绝对含量,建立了一种气相色谱-质谱/选择离子扫描(gas chromatography mass spectrometry/selective ion monitoring,GC-MS/SIM)方法,对其中主要成分(α-蒎烯、β-蒎烯、D-柠檬烯、1,8-桉叶素、芳樟醇、香茅醛、柠檬醛)进行了定性和定量分析。该方法简便、高效,在25 min内山苍子精油中各成分分离良好。各成分在一定范围内均线性关系良好(R2>0.999),精密度、稳定性及重复性均符合要求,平均加标回收率为93.40%~107.35%。结果表明:该方法符合方法学验证要求,可用于山苍子精油的多成分含量测定,并为其质量评价提供依据。展开更多
The method was proposed for detecting the pesticide residues such as organophosphorus and carbamates by GC/MS/SIM.The method is rapid and highly sensitive for 15 pesticide residues.
Trimethylamine in environment air is concentrated to deactivated SUMMA canister by three-grade cold trap,then analysed by GC-MS.The operation of the method is easy,and no pre-procession.The maximal injection-volume is...Trimethylamine in environment air is concentrated to deactivated SUMMA canister by three-grade cold trap,then analysed by GC-MS.The operation of the method is easy,and no pre-procession.The maximal injection-volume is up to 2L.The analysis method is adopted to the SIM method of GC-MS.The precision、sensitivity and accuracy of the method is good,the MDL of the method is 1.6×10-2mg/m3.展开更多
文摘A method for the rapid determination of 23 organophosphorus pesticide residues in vegetables and fruits by SIM-GC-MS is described in this paper.Analysis is performed by gas-chromatography with mass selective detector（GC-MS）and selected ion monitoring（SIM）mode,and pesticides are positively confirmed by retention times and characteristic ion ratios.It takes less than 27 min to detect 23 organophosphorus pesticide residues.The spiked recoveries are between 70%～113%when the added pesticides concentration is in the range of 0.01μg～1.00μg.The RSD is less than 20%.The limit of detection is 0.001μg·g-1～0.06μg·g-1.This method is suitable for the daily detection of normal laboratory.
文摘为了探究山苍子精油中主要成分的绝对含量,建立了一种气相色谱-质谱/选择离子扫描(gas chromatography mass spectrometry/selective ion monitoring,GC-MS/SIM)方法,对其中主要成分(α-蒎烯、β-蒎烯、D-柠檬烯、1,8-桉叶素、芳樟醇、香茅醛、柠檬醛)进行了定性和定量分析。该方法简便、高效,在25 min内山苍子精油中各成分分离良好。各成分在一定范围内均线性关系良好(R2>0.999),精密度、稳定性及重复性均符合要求,平均加标回收率为93.40%~107.35%。结果表明:该方法符合方法学验证要求,可用于山苍子精油的多成分含量测定,并为其质量评价提供依据。
文摘The method was proposed for detecting the pesticide residues such as organophosphorus and carbamates by GC/MS/SIM.The method is rapid and highly sensitive for 15 pesticide residues.
文摘Trimethylamine in environment air is concentrated to deactivated SUMMA canister by three-grade cold trap,then analysed by GC-MS.The operation of the method is easy,and no pre-procession.The maximal injection-volume is up to 2L.The analysis method is adopted to the SIM method of GC-MS.The precision、sensitivity and accuracy of the method is good,the MDL of the method is 1.6×10-2mg/m3.
