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| Any ionization process in which [[ion]]s are formed in the gas phase at atmospheric pressure.
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| Atmospheric pressure ionization is any process in which ions are formed from atoms or molecules at atmospheric pressure. Note that atmospheric pressure ionization should not be used as a synonym for atmospheric pressure chemical ionization.
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| #D.I. Carroll, I. Dzidic, R.N. Stillwell, K.D. Haegele, E.C. Horning, Anal. Chem. 47 (1975) 2369.
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| #E. Rosenberg, J. Chromatogr., A 1000 (2003) 841.
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| #J.F.J. Todd, Int. J. Mass Spectrom. Ion Processes 142 (1995) 211.}}
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| Page 11: "...when used as an abbreviation for [[atmospheric pressure chemical ionization]]..."
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| {{asms|
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| Ionization technique(s) that occur at atmospheric pressure. Specific API ionization techniques include electrospray, pneumatically assisted electrospray and atmospheric pressure chemical ionization and is often used to couple LC to MS.
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| '''A reader???????????s commen'''t: Atmospheric pressure ionization (API) should remain a general term, for any form of ionization at atmosphere. The definition given is specific for chemical ionization at atmosphere. The definition given should be for a separate term, atmospheric pressure chemical ionization (APCI). This was merely the first atmospheric pressure ionization means that was commercialized. API would then properly include, electrospray (ESI), APCI, Ionspray (a coined term, and more generally this is pneumatically-assisted electrospray), and flame ionization (in some of the early papers on API this was the mode of ionization). Lots of others have been tried including microwave, etc.
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| == See also ==
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| *[[Atmospheric Pressure Chemical Ionization]]
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| *[[Atmospheric Pressure Photo-ionization]]
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| *[[Chemical Ionization]]
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| *[[Electrospray Ionization]]
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| [[Category:Ionization]] | | [[Category:Ionization]] |
| {{DEFAULTSORT:Atmospheric Pressure Ionization}} | | {{DEFAULTSORT:Atmospheric Pressure Ionization}} |
This template is no longer used.
Other versions
Gold Book
| GOLD BOOK DEFINITION
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the Gold Book). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997).
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| Atmospheric pressure ionization
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| IUPAC Gold Book
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| Index of Gold Book Terms
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