Prolate trochoidal mass spectrometer

A prolate trochoidal mass spectrometer is an chemical analysis instrument in which the ions of different mass-to-charge ratio are separated by means of mutually perpendicular electric and magnetic fields so that the ions follow a prolate trochoidal path. cite journal|title=A New Mass Spectrometer with Improved Focusing Properties|journal=Phys. Rev.|date=1938|first=Walker|last=Bleakney|coauthors=John A. Hipple, Jr.|volume=53|issue=7|pages=521–529|doi= 10.1103/PhysRev.53.521|url=http://link.aps.org/abstract/PR/v53/p521|format=|accessdate=2007-10-02 ] These devices are sometimes called cycloidal mass spectrometers, although the path is not a cycloid (the prolate trochoid path has loops, the cycloid has cusps).

The instruments are used for the analysis of gasescite journal |author=Adamczyk B, Bederski K, Wójcik L |title=Mass spectrometric investigation of dissociative ionization of toxic gases by electrons at 20-1000 eV |journal=Biomed. Environ. Mass Spectrom. |volume=16 |issue=1-12 |pages=415–7 |year=1988 |pmid=3149538 |doi=] and in gas chromatography-mass spectrometry.cite journal |author=Laramée JA, Deinzer ML |title=Capillary gas chromatographic introduction of environmental compounds into a trochoidal electron monochromator/mass spectrometer |journal=Anal. Chem. |volume=66 |issue=5 |pages=719–24 |year=1994 |pmid=8154592 |doi=] The trochoidal configuration can also be used as the basis of an electron monochromator.cite journal |author=Voinov VG, Vasil'ev YV, Morré J, Barofsky DF, Deinzer ML, Gonin M, Egan TF, Führer K |title=A resonant electron capture time-of-flight MS with trochoidal electron monochromator |journal=Anal. Chem. |volume=75 |issue=13 |pages=3001–9 |year=2003 |pmid=12964744 |doi=]

References

External links

* [http://www.iupac.org/goldbook/P04874.pdf IUPAC Definition]
*Cite patent|US|6624410 Cycloidal mass spectrometer
*Cite patent|US|6617576 Cycloidal mass spectrometer with time of flight characteristics and associated method