Development of atmospheric pressure chemical ionization mass spectrometry using accurate corona discharges and its application to field measurements

化学电离(CI)质谱仪可以在不分解的情况下对挥发性有机化合物进行高灵敏度和实时分析，这在现场测量中得到了广泛的应用。当前CI技术的一个主题不是寻找用于酸性(In)有机化合物电离的反应物离子。在这项研究中，我使用精确的电晕放电系统，建立了一种离子源，可以规则地形成适合于电离含有硝基和氨基的酸性有机化合物的反应物离子。研究结果将有助于柴油车尾气中未知硝基有机化合物的鉴定和定量分析。

Chemical ionization(CI) mass spectrometry allows high-sensitive and real-time analysis of volatile organic compounds without decomposition, which are widely used under field measurements. A subject of current CI techniques is not to find reactant ions for ionization of acidic(in) organic compounds. In this study, I have established an ion source leading to the regular formation of reactant ions suitable for the ionization of acidic organic compounds having nitro and amino groups, using an accurate corona discharge system. The results obtained would contribute toward the identification and quantitative analysis of unknown nitro organic compounds in diesel vehicle exhausts.