ETH Zurich, Department of Chemistry and Applied Biosciences, CH-8093 Zürich, Switzerland.
Analyst. 2017 May 30;142(11):1909-1915. doi: 10.1039/c7an00245a.
In this study, a gas chromatography (GC) system was interfaced to a high-resolution Orbitrap mass spectrometer by means of an active capillary plasma ionization source, based on dielectric barrier discharge ionization (DBDI). This allowed highly efficient soft ionization of gas-phase, chromatographically resolved compounds at ambient pressure. Several pesticides and illicit drugs were analyzed, and the limits of detections (LODs) were as low as 30 pg mL for the GC-DBDI-MS coupling (corresponding to 60 fg on-column sensitivity) and 30 fg mL for SPME-GC-DBDI-MS.
在这项研究中，通过基于介电阻挡放电电离（DBDI）的主动毛细管等离子体电离源，将气相色谱（GC）系统与高分辨率轨道阱质谱仪相连接。这使得在常压下对气相、色谱分离的化合物进行高效的软电离成为可能。分析了几种农药和非法药物，GC-DBDI-MS 联用的检测限（LOD）低至 30 pg mL（相当于柱上 60 fg 的灵敏度），SPME-GC-DBDI-MS 的检测限低至 30 fg mL。
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