1.兰州市食品药品检验检测研究院,食品中农药兽药残留监控重点实验室,甘肃 兰州 730050
2.中国农业大学食品科学与营养工程学院,北京 100083
3.甘肃农业大学 理学院,甘肃 兰州 730070
4.天津科技大学 省部共建食品营养与安全国家重点实验室,天津 300457
常巧英,博士,高级工程师,研究方向:食品安全与化学污染物检测技术,E-mail:c81618@163.com
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杨志敏,常巧英,李坚等.羟基多壁碳纳米管分散固相萃取/气相色谱-串联质谱法测定党参中75种农药残留[J].分析测试学报,2022,41(06):827-834.
YANG Zhi-min,CHANG Qiao-ying,LI Jian,et al.Determination of 75 Pesticide Residues in Codonopsis Radix by Gas Chromatography-Tandem Mass Spectrometry with Dispersive Solid Phase Extraction Based on Hydroxylated Multi-walled Carbon Nanotubes[J].Journal of Instrumental Analysis,2022,41(06):827-834.
杨志敏,常巧英,李坚等.羟基多壁碳纳米管分散固相萃取/气相色谱-串联质谱法测定党参中75种农药残留[J].分析测试学报,2022,41(06):827-834. DOI: 10.19969/j.fxcsxb.22022103.
YANG Zhi-min,CHANG Qiao-ying,LI Jian,et al.Determination of 75 Pesticide Residues in Codonopsis Radix by Gas Chromatography-Tandem Mass Spectrometry with Dispersive Solid Phase Extraction Based on Hydroxylated Multi-walled Carbon Nanotubes[J].Journal of Instrumental Analysis,2022,41(06):827-834. DOI: 10.19969/j.fxcsxb.22022103.
基于羟基多壁碳纳米管(MWCNTs - OH)净化剂改进的分散固相萃取技术,建立了党参中75种农药残留的气相色谱-串联质谱(GC - MS/MS)检测方法。样品经乙酸乙酯提取,无水硫酸镁、乙酸钠、N-丙基乙二胺和羟基碳纳米管盐析、萃取净化后,采用气相色谱-串联质谱仪测定,动态多反应监测(dMRM)模式扫描,基质标准曲线外标法定量。75种农药在5~300 μg/L范围内线性关系良好,相关系数(,r,2,)均不低于0.996 1。方法检出限(LOD)和定量下限(LOQ)分别为0.001~0.054 mg/kg和0.002~0.178 mg/kg,在0.025、0.05、0.20、0.50 mg/kg 4个加标水平的平均回收率为69.7%~113%,相对标准偏差(RSD,,n, = 4)为0.64%~6.7%。该方法操作简单、快速、准确,适用于党参中农药多残留的高通量检测。
A gas chromatography-tandem mass spectrometric(GC-MS/MS) method was developed for the rapid determination of 75 pesticide residues in codonopsis radix,based on modified dispersive solid phase extraction using hydroxylated multi-walled carbon nanotubes(MWCNTs-OH) as sorbent.The samples were extracted with ethyl acetate,then salted out and cleaned up with anhydrous magnesium sulfate,sodium acetate,N-primary secondary amine(PSA) and MWCNTs-OH,finally analyzed by gas chromatography-tandem mass spectrometry in the dynamic multiple reaction monitoring(dMRM) mode and quantified by the matrix-matched external standard method.There were good linear relationships for 75 pesticides in the range of 5-300 μg/L,with correlation coefficients(,r,2,) no less than 0.996 1.The limits of detection(LODs) and the limits of quantitation(LOQs)were 0.001-0.054 mg/kg and 0.002-0.178 mg/kg,respectively.The average recoveries at four spiked levels of 0.025,0.05,0.20 and 0.50 mg/kg ranged from 69.7% to 113%,with relative standard deviations(RSDs,,n, = 4) of 0.64%-6.7%.This method is simple,rapid and accurate,and it is suitable for high-throughput detection of pesticide residues in codonopsis radix.
羟基多壁碳纳米管分散固相萃取气相色谱-串联质谱法农药残留党参
hydroxylated multi-walled carbon nanotubesdispersive solid phase extractiongas chromatography-tandem mass spectrometrypesticide residuescodonopsis radix
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