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
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
A new method was developed for the simultaneous determination of three kinds of flame retardants such as polybromobiphenyls,pentabromodiphenyl ether,octabromobiphenyl ether and tris(2,3-dibromopropyl) phosphate in tex...A new method was developed for the simultaneous determination of three kinds of flame retardants such as polybromobiphenyls,pentabromodiphenyl ether,octabromobiphenyl ether and tris(2,3-dibromopropyl) phosphate in textile products by gas chromatography/mass spectrometry with selected ion monitoring mode.The retardants in textile products were Soxhlet extracted with toluene as the extraction solvent.The pretreatment conditions and analytical conditions were optimized.The method was simple,rapid and accurate.The average recovery ranged from 82.7% to 105% while RSD varied from 2.0% to 5.6%(n=5).The detection limit ranged from 0.5 to 10mg/kg(S/N=5).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.
文摘A new method was developed for the simultaneous determination of three kinds of flame retardants such as polybromobiphenyls,pentabromodiphenyl ether,octabromobiphenyl ether and tris(2,3-dibromopropyl) phosphate in textile products by gas chromatography/mass spectrometry with selected ion monitoring mode.The retardants in textile products were Soxhlet extracted with toluene as the extraction solvent.The pretreatment conditions and analytical conditions were optimized.The method was simple,rapid and accurate.The average recovery ranged from 82.7% to 105% while RSD varied from 2.0% to 5.6%(n=5).The detection limit ranged from 0.5 to 10mg/kg(S/N=5).
