单光子电离质谱用于二噁英前生体检测

垃圾焚烧处理是二噁英的主要产生源之一,在二噁英的形成阶段会先形成氯苯、氯酚、多环芳烃等二噁英类前生体。这些前生体浓度较高,并且与二噁英类毒性当量存在密切关联。对前生体的在线检测研究已成为主要研究方向之一。本研究利用自制的纳秒真空紫外电离-飞行时间质谱仪,发展了一种快速测量气相条件下氯苯、多氯酚、萘等方法,并通过标准样测试对该方法进行了实验评估。对于氯苯标准样,在5~100μg/L范围内,用本方法获得的母体离子信号强度与浓度呈现良好的线性关系。...

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Bibliographic Details
Published in分析化学 Vol. 42; no. 2; pp. 173 - 178
Main Author 刘本康 陈亮 王艳秋 宋哲 王利
Format Journal Article
LanguageChinese
Published 中国科学院大连化学物理研究所,大连,1160232%辽宁师范大学,大连,116029 2014
Subjects
二噁英前生体
单光子电离
真空紫外
飞行时间质谱
Dioxin precursors
Single photon ionization
真空紫外
单光子电离
Vacuum ultraviolet
二噁英前生体
Time-of-flight mass spectrometry
飞行时间质谱
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ISSN0253-3820
DOI10.3724/SP.J.1096.2014.30331

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Summary:垃圾焚烧处理是二噁英的主要产生源之一,在二噁英的形成阶段会先形成氯苯、氯酚、多环芳烃等二噁英类前生体。这些前生体浓度较高,并且与二噁英类毒性当量存在密切关联。对前生体的在线检测研究已成为主要研究方向之一。本研究利用自制的纳秒真空紫外电离-飞行时间质谱仪,发展了一种快速测量气相条件下氯苯、多氯酚、萘等方法,并通过标准样测试对该方法进行了实验评估。对于氯苯标准样,在5~100μg/L范围内,用本方法获得的母体离子信号强度与浓度呈现良好的线性关系。
Bibliography:Waste incineration has been considered as a main source of dioxins. During the generation of dioxins, dioxin precursors, such as polychlorinated benzenes （PCBz）, polychlorinated phenols （PCPh）, polycyclic aromatic hydrocarbon （PAHs）, polychlorinated biphenyls （PCBs） etc., have been proved to be produced with much higher concentrations than dioxins, which had been determined to be closely related to dioxin toxic equivalents. Therefore, online monitoring of these precursor compounds has been becoming one of the main research directions of dioxin detection. In this paper, we reported our attempt on developing a new method for online detection of these dioxin precursors in gas phase, by nanosecond vacuum ultraviolet single photon ionization technique, combined with time-of-flight mass spectrometer. This setup was evaluated by monitoring chlorobenzene, polychlorinated phenols and naphthalene in gas phase. In the range of 5-100μg/L, parent ion signal intensity of chlorobenzene exhibits linear dependence on the conc
ISSN:0253-3820
DOI:10.3724/SP.J.1096.2014.30331