Ion attachment mass spectrometry

Infobox Laboratory equipment
name = Ion attachment mass spectrometry


caption =
acronym = IAMS
other_names =
uses =
related = Chemical ionization

Ion-attachment mass spectrometry (IAMS) is a form of mass spectrometry that uses a "soft" form of ionization similar to chemical ionization in which a cation is attached to the analyte molecule in a reactive collision::$M\; +\; X^+\; +\; A\; o\; MX^+\; +\; A$

Where M is the analyte molecule, X⁺ is the cation and A is a non-reacting collision partner. [ cite journal|title=Lithium ion attachment mass spectrometry: Instrumentation and features|journal=Review of Scientific Instruments|date=|first=|last=|coauthors=|volume=|issue=|pages=|id= |url=|format=|accessdate=2007-11-01 ]

Principle

This technique is applicable to gases or any materials that can be vaporized. It uses a non-fragmenting non-conventional ionisation mode, by attachment of a lithium (or alkaline) ion to the gas to be analysed with a more traditional mass filter. This instrument is more dedicated to analysis of moderately-sized molecules such as organic or aromatic compounds. [ cite journal|title=Aromatic ion attachment mass spectrometry: an ion-molecule reaction for organosulfur analysis|journal=Organic Mass Spectrometry|date=|first=|last=|coauthors=|volume=|issue=|pages=|id= |url=|format=|accessdate=2007-11-01 ]

Applications

Currently, it is used industrially to verify, with a high throughput, the concentrations of brominated flame retardants (BFR) in plastics in compliance with European RoHS (Restriction of Hazardous Substances) regulation in place since 2006. The banned molecules include PBB and PBDE, whose concentration should not exceed 0.1% w/w. [cite web | title = The guide of environmental quality assurance for a supplier of JVC |date=July 2006 | publisher = JVC | url = http://www.jvc-victor.co.jp/company/environ/wr/gprocure/eqaguide_e.pdf] [Pittcon 2006; Poster by Y. Shiokawa; The Rapid Analysis of Brominated Flame Retardants in Resin Used for Electrical Appliances by Ion Attachment Mass Spectrometry.] [ cite journal|title=State of bromine based flame retarding agent mixing and its countermeasure|journal=Sangyo to Kankyo|date=|first=|last=|coauthors=|volume=|issue=|pages=|id= |url=|format=|accessdate=2007-11-01 ]

IAMS has also been used to analyze diesel exhaust particlescite journal |author=Masaki H, Chen L, Korenaga T |title=Direct analysis of diesel exhaust particles by fragmentation-free mass spectrometry using ion attachment mass spectrometry |journal=Environmental sciences : an international journal of environmental physiology and toxicology |volume=13 |issue=6 |pages=347–52 |year=2006 |pmid=17273150 |doi=] , in ceramic processing cite journal |author=Tsugoshi T, Nagaoka T, Nakamura M, Shiokawa Y, Watari K |title=Application of ion attachment mass spectrometry to evolved gas analysis for in situ monitoring of porous ceramic processing |journal=Anal. Chem. |volume=78 |issue=7 |pages=2366–9 |year=2006 |pmid=16579621 |doi=10.1021/ac0518248] and in semiconductor critical SiO2 etch processing.

References

Bibliography

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External links

*cite web |publisher=Ecole Polytechnique |title=What's About Ion Attachment Mass Spectrometry (IAMS) |url=http://www.dcmr.polytechnique.fr/~sablier/pages/IAMS.htm
* [http://europa.eu/eur-lex/pri/en/oj/dat/2003/l_037/l_03720030213en00190023.pdf RoHS official text ]
*Cite patent|US|7164121 Ion Attachment Mass Spectrometry Method
*Cite patent|US|7084397. Ion Attachment Mass Spectrometry Apparatus