Atmospheric Pressure Ionization Sources: Their Use and
Atmospheric Pressure Ionization Sources: Their Use and Applicability White Paper 4 ˜˚˛˝˙ˆˇ˚˘ ˘ˇ ˚ Figure 5 Schematic showing the ionization process in atmospheric pressure photoionization (APPI) The most commonly used VUV lamp is a krypton lamp, which emits photons with approximately 10 eV energy Any species
Atmospheric Pressure Chemical Ionization (APCI)
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Atmospheric Pressure Ionization (API)
ESI: Electrospray Ionization & APMALDI APCI: Atmospheric Pressure Chemical Ionization APPI: Atmospheric Pressure Photo Ionization EI, CI, GC-MS Molecular Weight Analyte Polarity ESI & APMALDI 1000 100,000 10,000 nonpolar very polar APCI & APPI
Simultaneous Electrospray and Atmospheric Pressure Chemical
Simultaneous Electrospray and Atmospheric Pressure Chemical Ionization: The Science Behind the Agilent Multimode Ion Source 2 Agilent Technologies Under optimal APCI conditions, ion formation occurs as follows: 1 A spray of droplets is formed 2 The spray is dried completely creating a mix-ture of solvent molecules and analyte mole-cules in
Basics of LC/MS (5988-2045EN)
In atmospheric pressure ionization, the analyte molecules are ionized first, at atmospheric pressure The analyte ions are then mechanically and electrostatically separated from neutral molecules Common atmospheric pressure ionization techniques are: • Electrospray ionization (ESI) • Atmospheric pressure chemical ionization (APCI)
Capillary electrophoresis-atmospheric pressure chemical
the potential of alternative ionization techniques for CE-MS, such as atmospheric pressure chemical ioniza-tion (APCI) [2–5] and, more recently, atmospheric pres-sure photoionization (APPI) [6–9] Owing to its capa-bility to form both even- and odd-electron ions, the latter technique was found suitable for ionization of
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