目的优化大体积进样联合气相色谱质谱联用仪(programmed temperature vaporizer-gas chromatography-mass spectrometry,PTV-GC-MS)同时测定饮用水中27种有机物的方法。方法水中氯苯类、有机磷农药、有机氯农药等27种有机物通过HLB小柱...目的优化大体积进样联合气相色谱质谱联用仪(programmed temperature vaporizer-gas chromatography-mass spectrometry,PTV-GC-MS)同时测定饮用水中27种有机物的方法。方法水中氯苯类、有机磷农药、有机氯农药等27种有机物通过HLB小柱固相萃取,乙酸乙酯洗脱,PTV-GC-MS测定,内标法定量。结果27种有机物线性关系良好,相关系数均>0.995,方法检出限为(0.007~0.04)μg/L,回收率在64.1%~129.8%之间,RSD为2.3%~14.8%(n=6)。结论优化的PTV-GC-MS法测定饮用水中27种有机物的方法快速、准确、高效。展开更多
A rapid,sensitive,and cost-effective analyticalmethod was developed for the analysis of selected semivolatileorganic compounds in water.The method used anautomated online solid-phase extraction technique coupledwith p...A rapid,sensitive,and cost-effective analyticalmethod was developed for the analysis of selected semivolatileorganic compounds in water.The method used anautomated online solid-phase extraction technique coupledwith programmed-temperature vaporization large-volumeinjection gas chromatography/mass spectrometry.Thewater samples were extracted by using a fully automatedmobile rack system based on x-y-z robotic techniquesusing syringes and disposable 96-well extraction plates.The method was validated for the analysis of 30 semivolatileanalytes in drinking water,groundwater,andsurface water.For a sample volume of 10 mL,the linearcalibrations ranged from 0.01 or 0.05 to 2.5μg·L^(-1),and themethod detection limits were less than 0.1μg·L^(-1).For thereagent water samples fortified at 1.0μg·L^(-1)and2.0μg·L^(-1),the obtained mean absolute recoveries were70%-130%with relative standard deviations of less than20%for most analytes.For the drinking water,groundwater,and surface water samples fortified at 1.0μg·L^(-1),theobtained mean absolute recoveries were 50%-130%withrelative standard deviations of less than 20%for mostanalytes.The new method demonstrated three advantages:1)no manipulation except the fortification of surrogatestandards prior to extraction;2)significant cost reductionassociated with sample collection,shipping,storage,andpreparation;and 3)reduced exposure to hazardous solventsand other chemicals.As a result,this new automatedmethod can be used as an effective approach for screeningand/or compliance monitoring of selected semi-volatileorganic compounds in water.展开更多
文摘目的优化大体积进样联合气相色谱质谱联用仪(programmed temperature vaporizer-gas chromatography-mass spectrometry,PTV-GC-MS)同时测定饮用水中27种有机物的方法。方法水中氯苯类、有机磷农药、有机氯农药等27种有机物通过HLB小柱固相萃取,乙酸乙酯洗脱,PTV-GC-MS测定,内标法定量。结果27种有机物线性关系良好,相关系数均>0.995,方法检出限为(0.007~0.04)μg/L,回收率在64.1%~129.8%之间,RSD为2.3%~14.8%(n=6)。结论优化的PTV-GC-MS法测定饮用水中27种有机物的方法快速、准确、高效。
基金The authors thank LEAP Technologies(Carrboro,NC,USA)for providing the technical support of the automated solid-phase extraction system.
文摘A rapid,sensitive,and cost-effective analyticalmethod was developed for the analysis of selected semivolatileorganic compounds in water.The method used anautomated online solid-phase extraction technique coupledwith programmed-temperature vaporization large-volumeinjection gas chromatography/mass spectrometry.Thewater samples were extracted by using a fully automatedmobile rack system based on x-y-z robotic techniquesusing syringes and disposable 96-well extraction plates.The method was validated for the analysis of 30 semivolatileanalytes in drinking water,groundwater,andsurface water.For a sample volume of 10 mL,the linearcalibrations ranged from 0.01 or 0.05 to 2.5μg·L^(-1),and themethod detection limits were less than 0.1μg·L^(-1).For thereagent water samples fortified at 1.0μg·L^(-1)and2.0μg·L^(-1),the obtained mean absolute recoveries were70%-130%with relative standard deviations of less than20%for most analytes.For the drinking water,groundwater,and surface water samples fortified at 1.0μg·L^(-1),theobtained mean absolute recoveries were 50%-130%withrelative standard deviations of less than 20%for mostanalytes.The new method demonstrated three advantages:1)no manipulation except the fortification of surrogatestandards prior to extraction;2)significant cost reductionassociated with sample collection,shipping,storage,andpreparation;and 3)reduced exposure to hazardous solventsand other chemicals.As a result,this new automatedmethod can be used as an effective approach for screeningand/or compliance monitoring of selected semi-volatileorganic compounds in water.
