mass spectrometer

mass spectrometer
mass spectrometer mass spectrometer n. (Physics, Chemistry) An analytical instrument which determines the mass of molecules of a substance or fragments of its molecules. It functions by injecting ionized moecules or molecular gragments into a vacuum chamber subjected to a strong magnetic field, in which charged particles move in a curved trajectory.

Note: The mass is determined by observing the path of the molecule after being charged and accelerated in a magnetic field. The path of the ionic fragment depends on the charge, velocity, and mass. Several techniques of charging and detection are employed. The mass information is usually used to infer structure or chemical composition of the substance analyzed. Variants of mass spectrometer called {high-resolution mass spectrometer} permit determination of the mass of a molecule or molecular fragment with sufficient precision to unambiguously determine the atomic composition. [PJC]


The Collaborative International Dictionary of English. 2000.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • mass spectrometer — n a mass spectroscope that detects ions by means of electronic amplification * * * an analytical instrument which identifies a substance by sorting a stream of electrified particles (ions) according to their mass; the sorting is most commonly… …   Medical dictionary

  • mass spectrometer — masių spektrometras statusas T sritis Standartizacija ir metrologija apibrėžtis Spektrometras jonizuotiesiems atomams ar molekulėms suskirstyti pagal masę arba savitąjį krūvį ir šiems dydžiams matuoti. atitikmenys: angl. mass spectrometer vok.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • mass spectrometer — masių spektrometras statusas T sritis Standartizacija ir metrologija apibrėžtis Spektrometras jonizuotųjų molekulių ir atomų pasiskirstymui pagal jų mases tirti ir registruoti. Jo veikimas pagrįstas magnetinio ir elektrinio laukų poveikiu į… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • mass spectrometer — masių spektrometras statusas T sritis fizika atitikmenys: angl. mass spectrometer vok. Massenspektrometer, n rus. масс спектрометр, m pranc. spectromètre de masse, m …   Fizikos terminų žodynas

  • mass spectrometer — mass′ spectrom′eter n. phs a device that uses deflection of ions in an electromagnetic field as a basis for identifying the kinds of particles present in a substance • Etymology: 1930–35 mass′ spectrom′etry, n …   From formal English to slang

  • mass spectrometer method — masių spektrometrijos metodas statusas T sritis fizika atitikmenys: angl. mass spectrometer method; mass spectrometric method vok. Massenspektrometermethode, f; massenspektrometrische Methode, f rus. масс спектральный метод, m; масс… …   Fizikos terminų žodynas

  • mass-spectrometer leak detector — masių spektrometrinis nuotėkio ieškiklis statusas T sritis radioelektronika atitikmenys: angl. mass spectrometer leak detector vok. Massenspektrometerlecksuchgerät, n rus. масс спектрометрический течеискатель, m pranc. détecteur de fuites à… …   Radioelektronikos terminų žodynas

  • mass spectrometer — noun spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer • Syn: ↑spectrometer • Derivationally related forms: ↑spectrometric (for: ↑spectrometer) • Hypernyms: ↑ …   Useful english dictionary

  • mass spectrometer — /mæs spɛkˈtrɒmətə/ (say mas spek tromuhtuh) noun a device for separating atoms or molecules of different masses by utilising the fact that the ions of such entities are deflected in a magnetic field by an amount which depends on the mass and… …  

  • mass spectrometer — noun A device used in mass spectrometry to discover the mass spectrum of a given substance …   Wiktionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”