Prolate trochoidal mass spectrometer explained

A prolate trochoidal mass spectrometer is a 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.^[1] 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).

Applications

The instruments are used for the analysis of gases^[2] and in gas chromatography-mass spectrometry.^[3] The trochoidal configuration can also be used as the basis of an electron monochromator.^[4]

External links

• US. 6624410. 2003-09-23. Cycloidal mass spectrometer. Monitor Instruments Co.. Voss. Guenter F..
• US. 6617576. 2003-09-09. Cycloidal mass spectrometer with time of flight characteristics and associated method. Monitor Instruments Co.. Voss. Guenter F.. Celo. Alan B.. Duryea. Anthony N..

Notes and References

1. A New Mass Spectrometer with Improved Focusing Properties. Phys. Rev.. 1938. Walker. Bleakney. John A. Hipple Jr.. 53. 7. 521–529. 10.1103/PhysRev.53.521. 2007-10-02 . 1938PhRv...53..521B .
2. Adamczyk B, Bederski K, Wójcik L . Mass spectrometric investigation of dissociative ionization of toxic gases by electrons at 20-1000 eV . Biomed. Environ. Mass Spectrom. . 16 . 1–12 . 415–7 . 1988 . 3149538 . 10.1002/bms.1200160181.
3. Laramée JA, Deinzer ML . Capillary gas chromatographic introduction of environmental compounds into a trochoidal electron monochromator/mass spectrometer . Anal. Chem. . 66 . 5 . 719–24 . 1994 . 8154592 . 10.1021/ac00077a022.
4. Voinov VG, Vasil'ev YV, Morré J, Barofsky DF, Deinzer ML, Gonin M, Egan TF, Führer K . A resonant electron capture time-of-flight MS with trochoidal electron monochromator . Anal. Chem. . 75 . 13 . 3001–9 . 2003 . 12964744 . 10.1021/ac030019v.