INDUSTRY|chemistry
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- ga
- QMS | quadrupole mass spectrometer
- en
- Definition type of mass analyzer used in mass spectrometry which consists of 4 circular rods, set highly parallel to each other Reference Wikipedia > Quadrupole mass analyzer. http://en.wikipedia.org/wiki/Quadrupole_mass_analyzer [12.11.2010]
- Comment The quadrupole is the component of the instrument responsible for filtering sample ions, based on their mass-to-charge ratio (m/z). Ions are separated in a quadrupole based on the stability of their trajectories in the oscillating electric fields that are applied to the rods.These mass spectrometers excel at applications where particular ions of interest are being studied because they can stay tuned on a single ion for extended periods of time. One place where this is useful is in liquid chromatography-mass spectrometry or gas chromatography-mass spectrometry where they serve as exceptionally high specificity detectors. Quadrupole instruments are often reasonably priced and make good multi-purpose instruments.
- spectromètre de masse tétrapolaire | analyseur quadripolaire
- fr
- Definition spectromètre de masse dans lequel les ions sont injectés selon l'axe d'une lentille quadripolaire, formée par un système de quatre électrodes, généralement en forme de barres rondes, lentille à laquelle on applique une tension radiofréquence et une tension continue, maintenues dans un rapport donné Reference X 10-502:1980