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首页> 外文期刊>The Journal of Chemical Physics >A SELECTED ION FLOW TUBE STUDY OF THE REACTIONS OF NO+ AND O-2(+) IONS WITH SOME ORGANIC MOLECULES - THE POTENTIAL FOR TRACE GAS ANALYSIS OF AIR
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A SELECTED ION FLOW TUBE STUDY OF THE REACTIONS OF NO+ AND O-2(+) IONS WITH SOME ORGANIC MOLECULES - THE POTENTIAL FOR TRACE GAS ANALYSIS OF AIR

机译：NO +和O-2（+）离子与某些有机物反应的选择离子流管研究-空气中痕量气体分析的潜力

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A study has ben carried out using out selected ion flow tube apparatus of the reactions of NO2+ and O-2(+) ions in their vibronic ground states with ten organic species: the hydrocarbons, benzene, toluene, isoprene, cyclopropane, cyclopropane, and n-pentane; the oxygen-containing organics, methanol, ethanol, acetaldehyde, acetone, and diethyl ether. The major objectives of this work are, on the one hand, to fully understand the processes involved in these reactions and, on the other hand, to explore the potential of NO2+ and O-2(+) as chemical ionization agents for the analysis of trace gases in air and on human breath. Amongst the NO2+ reactions, charge transfer, hydride-ion transfer, and termolecular association occur, and the measured rate coefficients, k, for the reactions vary from immeasurably small to the maximum value, collisional rate coefficient, k(c). The O-2(+) reactions are all fast, in each case the k being equal to or an appreciable fraction of k(c), and charge transfer producing the parent organic ion or dissociative charge transfer resulting in two or three fragments of the parent ion are the reaction processes that occur. We conclude from these studies, and from previous studies, that NO2+ ions and O-2(+) ions can be used to great effect as chemical ionization agents for trace gas analysis, especially in combination with H3O+ ions which we now routinely use for this purpose. [References: 28]
机译：使用选定的离子流管设备进行了研究，研究了NO2 +和O-2（+）离子在其振动基态下与十种有机物的反应：烃，苯，甲苯，异戊二烯，环丙烷，环丙烷和正戊烷含氧有机物，甲醇，乙醇，乙醛，丙酮和乙醚。这项工作的主要目标是，一方面，全面了解这些反应所涉及的过程;另一方面，探索NO2 +和O-2（+）作为化学电离剂用于分析O2的潜力。在空气和人类呼吸中追踪气体。在NO2 +反应中，发生电荷转移，氢离子转移和分子间缔合，并且测得的反应速率系数k从不可估量的小变化到最大值，即碰撞速率系数k（c）。 O-2（+）反应都很快，在每种情况下k都等于k（c）或k（c）的相当一部分，并且电荷转移会产生母体有机离子或解离电荷转移，从而导致两个或三个片段母离子是发生的反应过程。我们从这些研究和以前的研究中得出结论，NO2 +离子和O-2（+）离子可以用作痕量气体分析的化学电离剂，特别是与现在通常用于此目的的H3O +离子结合使用时起很大的作用。目的。 [参考：28]

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