Ionization of organic molecules with metal ions formed in the laser plasma

Filatov Vasily V.; Nikiforov Sergey M.; Zelenov Vladislav V.; Pento Andrey V; Bukharina Aygul B.; Sulimenkov Ilia V; Brusov Vladimir S.; Yu Jiajun; Kozlovskiy Viacheslav I

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Ionization of organic molecules with metal ions formed in the laser plasma

机译：用在激光等离子体中形成的金属离子的有机分子电离

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A laser plasma ion source was used to ionize volatile organic compounds in a gas sample. The plasma was generated on a metal target in the intermediate vacuum region of ~0.3 Torr using a pulsed Nd:YAG laser with a wavelength of 1 mu m. The resulting ions mass spectra were acquired using orthogonal time-of-flight mass spectrometer (O-TOF MS). When using a copper target, the ions formed are simple complexes (CuM+) of copper ions with organic molecules. The possibility of online identification of trace amounts of alkanes in nitrogen and air, with a detection limit of ~10 ppb, was demonstrated. The ionization efficiency of volatile organic compounds through the formation of clusters with metal ions is 10(-4) in terms of the quasimolecular complex ions. The rate constants of ion-molecular reactions of copper ions with octane and water molecules in nitrogen and air are estimated.

机译：激光等离子体离子源用于电离气体样品中的挥发性有机化合物。使用波长为1μm的脉冲Nd:YAG激光器在约0.3托的中间真空区的金属靶上产生等离子体。使用正交飞行时间质谱仪（O-TOF MS）获得产生的离子质谱。当使用铜靶时，形成的离子是铜离子与有机分子的简单络合物（CuM+）。证明了在线识别氮和空气中微量烷烃的可能性，检测限为~10 ppb。挥发性有机化合物通过与金属离子形成团簇的电离效率为10（-4），以准分子络合物离子计算。估算了铜离子与辛烷和水分子在氮气和空气中的离子分子反应速率常数。

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《Journal of mass spectrometry: JMS》 |2021年第5期|共9页
作者
Filatov Vasily V.; Nikiforov Sergey M.; Zelenov Vladislav V.; Pento Andrey V; Bukharina Aygul B.; Sulimenkov Ilia V; Brusov Vladimir S.; Yu Jiajun; Kozlovskiy Viacheslav I;
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作者单位

Russian Acad Sci Chernogolovka Branch NN Semenov Fed Res Ctr Chem Phys Chernogolovka 142432 Russia;

RAS Prokhorov Gen Phys Inst Moscow 119991 Russia;

Russian Acad Sci Chernogolovka Branch NN Semenov Fed Res Ctr Chem Phys Chernogolovka 142432 Russia;

RAS Prokhorov Gen Phys Inst Moscow 119991 Russia;

RAS Prokhorov Gen Phys Inst Moscow 119991 Russia;

Russian Acad Sci Chernogolovka Branch NN Semenov Fed Res Ctr Chem Phys Chernogolovka 142432 Russia;

Russian Acad Sci Chernogolovka Branch NN Semenov Fed Res Ctr Chem Phys Chernogolovka 142432 Russia;

Jinan Univ Inst Mass Spectrometer &

Atmospher Environm Guangzhou 510632 Peoples R China;

Russian Acad Sci Chernogolovka Branch NN Semenov Fed Res Ctr Chem Phys Chernogolovka 142432 Russia;

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原文格式 PDF
正文语种 eng
中图分类分析化学;
关键词
complex; Cu; ionization; octane; rate constant;

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Ionization of organic molecules with metal ions formed in the laser plasma

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