Atmospheric-pressure chemical ionization - Wikipedia
Atmospheric pressure chemical ionization (APCI) is an ionization method used in mass spectrometry which utilizes gas-phase ion-molecule reactions at atmospheric pressure (10 5 Pa), [1] [2] commonly coupled with high-performance liquid chromatography (HPLC). [3]
Atmospheric Pressure Chemical Ionization (APCI) - MagLab
2022年12月23日 · Atmospheric pressure chemical ionization (APCI), a widely used ionization technique in mass spectrometry, is similar to atmospheric pressure photoionization (APPI). It is advantageous for its ability to easily ionize and detect nonpolar or slightly polar species.
Atmospheric Pressure Chemical Ionization - ScienceDirect
The atmospheric pressure chemical ionization (APCI) is a method for producing the molecular ions for the sample by ionizing a solvent by corona discharge under atmospheric pressure and then reacting it with the molecules of the sample.
Atmospheric-pressure Chemical Ionization | Encyclopedia MDPI
2022年12月1日 · Atmospheric pressure chemical ionization (APCI) is an ionization method used in mass spectrometry which utilizes gas-phase ion-molecule reactions at atmospheric pressure (105 Pa), commonly coupled with high-performance liquid chromatography (HPLC).
2.3: Ionization Techniques - Chemistry LibreTexts
2023年2月11日 · A related technique, atmospheric pressure chemical ionization (APCI) delivers the sample as a neutral spray, which is then ionized by corona discharge, producing ions in a similar manner as described above. APCI is particularly suited for low molecular weight, nonpolar species that cannot be easily analyzed by other common techniques such as ESI.
Atmospheric pressure chemical ionisation mass spectrometry for …
Atmospheric pressure chemical ionisation (APCI) 1 mass spectrometry (MS) is well established for the intact analysis of polar analytes with masses up to approximately 1500 Da, such as lipids, 2 steroids 3 and fatty acids. 4 Ionisation in APCI occurs in the vapour phase via a corona discharge stimulating a complex set of ion-molecule reactions ...
Chemical ionization - Wikipedia
Chemical ionization in an atmospheric pressure electric discharge is called atmospheric pressure chemical ionization (APCI), which usually uses water as the reagent gas.
3.3: Atmospheric Pressure Ionization and Electrospray Ionization
Atmospheric Pressure Ionization (API) sources ionize the sample at atmospheric pressure and then transfer the ions into the mass spectrometer. These techniques are used to ionize thermally labile samples such as peptides, proteins and polymers directly from the condensed phase.
Desorption atmospheric pressure chemical ionization: A review
2020年9月15日 · Desorption Atmospheric Pressure Chemical Ionization (DAPCI) is an ambient ionization technique for mass spectrometry (MS). DAPCI is a plasma-based ionization technique that uses inert, high-velocity gas, and solvent ions to ionize the analytes in a sample.
Review on atmospheric pressure ionization sources for gas ...
2023年1月15日 · Among the three API sources, APPI and APCI ionization seemed to provide the best sensitivity (APPI: LOD of 0.05–0.5 ng mL −1 [145], APCI:LOD 0.1–1 ng mL −1 [130]) compared to ESI (0.2–100 ng mL −1 [133]).
- 某些结果已被删除