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首页> 外文期刊>Journal of mass spectrometry: JMS >Non-vacuum field desorption ion source implemented under super-atmospheric pressure
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Non-vacuum field desorption ion source implemented under super-atmospheric pressure

机译：在超大气压下实现的非真空场解吸离​​子源

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摘要

Standard field desorption (FD) ionization is implemented under high vacuum condition. In this paper, non-vacuum FD is performed under a super-atmospheric pressure environment using untreated tungsten wires as FD emitter, and the ion source was coupled to a commercial linear ion trap mass spectrometer. The operating pressure of the ion source was 6 bars which was high enough to provide sufficient dielectric strength to the working gas so that the high voltage that was required for FD could be applied to the emitter without occurrence of electrical discharge. Non-volatile sample deposited on the bare tungsten wire FD emitter was heated by flowing direct current through the emitter. Similar to vacuum FD, the formation of conical protrusion of the liquefied sample layer under the strong electric field was also observed. Using the present ion source, high pressure field-desorption of polar neutral compounds, organic salts and ionic liquids is demonstrated.
机译：在高真空条件下实施标准场解吸（FD）电离。在本文中，使用未处理的钨丝作为FD发射器在超大气压环境下执行非真空FD，并将离子源耦合到商用线性离子阱质谱仪上。离子源的工作压力为6巴，该压力足够高，可以为工作气体提供足够的介电强度，因此FD所需的高电压可以施加到发射极而不会发生放电。通过使直流电流流过发射器来加热沉积在裸钨丝FD发射器上的非易失性样品。类似于真空FD，也观察到在强电场下液化样品层的锥形突起的形成。使用本发明的离子源，证明了极性中性化合物，有机盐和离子液体的高压场解吸。

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