氣相層析質(zhì)譜儀-瓦里安科技-預(yù)覽頁
【正文】 Conductivity Detector(TCD) ? Selective Detectors — Electron Capture Detector(ECD) — Pulsed Flame Photometric Detector(PFPD) — Thermionic Specific Detector(TSD) Information From GC ? Qualitation — Retention Time Same pound has the same . under the same GC conditions. ? Quantitation — Peak Area — Peak Height MS基本原理 The Basic Principle of Mass Spectrometry M M+. M+. m/z 15 m/z 57 m/z 27 m/z 43 m/z 29 Mass Analysis Data Recording Plot of Bar Graph 29 43 58 Ionization Mass Analyzer Ion Detection CH3CH2CH2CH3 The Basic Principle of Mass Spectrometry ? CH3CH2CH2CH3 ? CH3CH2CH2CH3 ? CH3CH2CH2CH3 e m/z 58 m/z 43 m/z 29 Mass Spectrometry ? Inlet Systems — GC, LC, Direct Probe Inlet….. ? Ion Source — EI, CI…… ? Mass Analyzer — Magic Sector, The Quadrupole Ion Trap….. ? Detector — Electron Multiplier….. Ionization: Electron Impact M+. m/z 15 m/z 57 m/z 27 m/z 43 m/z 29 29 43 58 Ionization: Chemical Ionization ? CH4 + e → CH4+? + 2e ? CH4+? + CH4 → CH3? + CH5+ ? CH5+ + M → CH 4 + (MH)+ — CH4 : CI gas — M : Analyte Electron Impact a
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