Dielectric Barrier Discharge Ionization of Perfluorinated Compounds,Analytical Chemistry

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Dielectric Barrier Discharge Ionization of Perfluorinated Compounds
Analytical Chemistry ( IF 6.7 ) Pub Date : 2015-11-05 00:00:00 , DOI: 10.1021/acs.analchem.5b03538
Alexander Schütz ₁ , Sebastian Brandt ₁ , Sascha Liedtke ₁ , Daniel Foest ₁ , Ulrich Marggraf ₁ , Joachim Franzke ₁

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The soft ionization ability based on plasma-jet protonation of molecules initiated by a dielectric barrier discharge ionization source (DBDI) is certainly an interesting application for analytical chemistry. Since the change of an applied sinusoidal voltage may lead to different discharge modes the applied discharge was powered by a square wave generator in order to get a homogeneous plasma. It is known that besides the protonation [M+H]⁺ of unpolar as well as some polar molecules the homogeneous DBDI can be used to ionize molecules directly [M]⁺. Here we prove that the DBDI can be applied to exchange fluorine by oxygen of perfluorinated compounds (PFC). PFC are organofluorine compounds with carbon–fluorine and carbon–carbon bonds only but no carbon–hydrogen bonds. While the position of the introduction into the plasma-jet is essential, PFC can be measured in the negative mass spectrometer (MS) mode.

中文翻译：

全氟化合物的介电垒放电电离

基于由电介质势垒放电电离源（DBDI）引发的分子的等离子体喷射质子化的软电离能力无疑是分析化学中令人感兴趣的应用。由于所施加的正弦电压的变化可能导致不同的放电模式，因此所施加的放电由方波发生器提供动力，以获得均匀的等离子体。众所周知，除了非极性分子和某些极性分子的质子化[M + H] ^+之外，均相DBDI还可用于直接电离分子[M] ⁺。在这里，我们证明DBDI可用于通过全氟化合物（PFC）的氧交换氟。PFC是仅具有碳氟键和碳碳键但无碳氢键的有机氟化合物。虽然引入等离子流的位置至关重要，但可以在负质谱仪（MS）模式下测量PFC。

更新日期：2015-11-05

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