| GC-NCI-MS法测定底泥中类二(噁)英多氯联苯 |
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| 引用本文： | 马召辉,金军,王英,亓学奎,丁问微,姜霞,吴小兵.GC-NCI-MS法测定底泥中类二(噁)英多氯联苯[J].环境科学与技术,2011,34(10):123-126. |
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| 作者姓名： | 马召辉 金军 王英 亓学奎 丁问微 姜霞 吴小兵 |
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| 作者单位： | 1. 中央民族大学生命与环境科学学院,北京,100081
2. 中国环境科学研究院,北京,100012 |
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| 基金项目： | 高等学校学科创新引智计划(B08044);国家大学生创新性实验计划(NMOE200911026);北京高等学校化学实验教学示范中心建设项目(2008);国家重大科技专项资助(2008ZX07101-010-04-1) |
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| 摘 要： | 建立了气相色谱/负化学负离源/质谱(G-NCI-MS)法测定底泥样品中世界卫生组织(WHO)推荐的12种类二(噁)英多氯联苯.底泥样品采用索氏提取,酸碱复合硅胶柱净化,选择离子扫描监测,同位素稀释内标法定量.比较PCBs各单体在负化学负离源(NCI)和电子轰击电离源(EI)条件下的灵敏度,发现PCBs各单体在NCI条件...
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| 关 键 词： | 类二(噁)英多氯联苯 气相色谱/负化学离子源/质谱 底泥 |
Determination of Dioxin-like PCBs in Sediment by Gas Chromatography/Negative Chemical Ionization/Mass Spectrometry |
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| MA Zhao-hui,JIN Jun,WANG Ying,QI Xue-kui,DING Wen-wei,JIANG Xia,WU Xiao-bing.Determination of Dioxin-like PCBs in Sediment by Gas Chromatography/Negative Chemical Ionization/Mass Spectrometry[J].Environmental Science and Technology,2011,34(10):123-126. |
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| Authors: | MA Zhao-hui JIN Jun WANG Ying QI Xue-kui DING Wen-wei JIANG Xia WU Xiao-bing |
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| Institution: | 1(1.School of Life and Environmental Science,Central Nationalities University of China,Beijing 100081,China;2.Chinese Research Academy of Environmental Science,Beijing 100012,China) |
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| Abstract: | A gas chromatography/negative chemical ionization/mass spectrometry(GC-NCI-MS)method was developed for determination of 12 types of dioxin-like PCBs which recommended by WHO.Sediment samples were extracted by Soxhlet apparatus,and cleaned with acid-base composite silica gel column,selected ion scan and quantified by isotope dilution method.Results showed that the sensitivity under NCI source measuring dioxin-like PCBs were 21~100 times higher than EI source.Under the method,the study obtained a lower instrument detection limit of 0.1 pg,the recovery of spiking three parallel matrix soil samples ranged from 84%~119%.The established method was used for determination of dioxin-like PCBs,PCB170 and PCB180 in sediment samples of Taihu Lake,results indicated that the concentration of PCBs were from 7.5 to 470 pg/g(dry weight)and average concentration was 108 pg/g(dry weight).Individual PCBs congeners concentration was from n.d.~155 pg/g(dry weight).Among these 14 congeners,PCB118 was the main congeners,followed by PCB77 and PCB105. |
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| Keywords: | dioxin-like PCBs gas chromatography/negative chemical ionization/mass spectrometry sediment |
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