| 改进的QuEchERS-串联质谱法测定莴苣中的124种农药残留 |
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| 引用本文： | 侯雪,韩梅,骆正联,刘又铭,刘凤. 改进的QuEchERS-串联质谱法测定莴苣中的124种农药残留[J]. 分析试验室, 2012, 0(8): 59-65 |
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| 作者姓名： | 侯雪 韩梅 骆正联 刘又铭 刘凤 |
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| 作者单位： | 四川省农业科学院分析测试中心;雅安职业技术学院 |
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| 基金项目： | 四川省财政育种工程专项资金项目资助 |
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| 摘 要： | 通过比较d-SPE(PSA+GCB)、SPE(NH2-Carb柱)和SPE(GCB/PSA柱)3种前处理方法的净化效果及方法稳定性,选取了GCB/PSA柱固相萃取作为净化方法。样品经前处理后,采用大体积进样,气相色谱-串联质谱测定,内标法定量。124种农药在浓度为0.010～0.200 mg/kg范围内与峰面积呈线性关系,相关系数均大于0.9800,以10倍信噪比计算,定量限在0.1～19.0μg/kg之间。当农药在样品中添加水平为0.040 mg/kg时,124种农药平均回收率(n=5)为80.0～130.7%,RSD为1.1～2.0%。
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| 关 键 词： | QuEchERS法 气相色谱-串联质谱法 莴苣 固相萃取 |
Study on detection of 124 pesticides in lettuce by modified QuEChERS method and gas chromatography-tandem mass spectrometry |
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| HOU Xue,HAN Mei,LUO Zheng-lian,LIU You-ming,and LIU Feng. Study on detection of 124 pesticides in lettuce by modified QuEChERS method and gas chromatography-tandem mass spectrometry[J]. Chinese Journal of Analysis Laboratory, 2012, 0(8): 59-65 |
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| Authors: | HOU Xue HAN Mei LUO Zheng-lian LIU You-ming and LIU Feng |
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| Affiliation: | 1.Center of Analysis and Testing,Sichuan Academy of Agricultural Science,Chengdu 610066;2.Yaan Vocational College,Ya’an 625000) |
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| Abstract: | Three processing methods:d-SPE(PSA+GCB)、SPE(NH2-Carb column) and SPE(GCB/PSA column) were compared based on the purifying effects and method stabilities.At last,SPE(GCB/PSA column) was selected as the purification method.After cleaned-up,the samples were injected using PTV injection mode,determined with a MS/MS detector based on MRM and calculated by internal standard method.The linear ranges of the determination were 0.010～0.200 mg/L(r2>0.9900) and the quantification limits(10 S/N) of this method were 0.1～19.0 μg/kg.When the spiked level was 0.040 mg/kg,the average recoveries ranged from 80.0% to 130.7 % with RSDs were 1.1～19.7 %. |
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| Keywords: | QuEchERS GC-MS/MS Lettuce SPE |
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