VUV single-photon ionization ion trap time-of-flight mass spectrometer for on-line, real-time monitoring of chlorinated organic compounds in waste incineration flue gas
VUV single-photon ionization ion trap time-of-flight mass spectrometer for on-line, real-time monitoring of chlorinated organic compounds in waste incineration flue gas
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DOI：
10.1021/ac048761y
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发表时间：
2005-02-15
影响因子：
7.4
通讯作者：
Morii, S
中科院分区：
文献类型：
--
作者：
Kuribayashi, S;Yamakoshi, H;Morii, S
在这项工作中，一个敏感和强大的真空紫外（VUV）单光子电离（SPI）离子阱飞行时间质谱仪（VUV-SPI-IT-TOFMS）的在线，实时监测垃圾焚烧烟气中的氯代有机化合物已新开发。采用121.6 nm真空紫外灯照射微波发生器和四极离子阱富集和选择分析物离子的无碎片SPI技术与反射飞行时间质谱仪相结合，检测痕量氯代有机化合物。该测量系统被调整为检测二恶英前体，目的是应用于监测焚烧炉烟气中的痕量有毒物质。因此，该技术使分析二恶英前体三氯苯（T3 CB）成为可能，在18 s内，灵敏度为80 ng/m（3）。N（10 pptv），使用离子阱中分析物物质的选择性积累和干扰物质的分离。并首次对实际垃圾焚烧烟气中T3 CB进行了连续监测7个月的现场试验。结果表明，该系统具有非常强大的性能，并能够保持高灵敏度分析T3 CB长月的操作。
In this work, a sensitive and robust vacuum ultra-violet (VUV) single-photon ionization (SPI) ion trap time-of-flight mass spectrometer (VUV-SPI-IT-TOFMS) for on-line, real-time monitoring of chlorinated organic compounds in waste incineration flue gas has been newly developed. The fragment-free SPI technique with 121.6-nm VUV lamp irradiated by a microwave generator and the quadrupole ion trap to accumulate and select analyte ions were combined with a reflectron time-of-flight mass spectrometer to detect chlorinated organic compounds at trace level. This measuring system was tuned up to detect dioxins precursors with the aim at an application to monitoring trace level toxic substances in flue gases from incinerator furnaces. As a result, this technology has made it possible to analyze trichlorobenzene (T3CB), a dioxin precursor, in 18 s with a sensitivity of 80 ng/m(3.)N (10 pptv) using the selective accumulation of analyte substances and separation of interfering substances in the ion trap. Moreover, the first field test of the continuous monitoring T3CB in an actual waste incineration flue gas had been done for 7 months. The results show that this system has an exceeding robust performance and is able to maintain the high sensitivity in analyzing T3CB for long months of operation.