Gaois

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4 results

  1. INDUSTRY|chemistry
    crómatagrafaiocht gháis in éineacht le mais-speictriméadracht ardtaifeach Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
    ga
    Gaschromatografie/hochauflösende Massenspektrometrie | GC-HRMS
    de
    GC-HRMS | gas chromatography/high resolution mass spectrometry | gas chromatography high-resolution mass spectrometry
    en
    Definition analytical technique coupling gas chromatography1 to high-resolution mass spectrometry21 gas chromatography [ IATE:1350135 ]2 high-resolution mass spectrometry [ IATE:3509898 ] Reference COM-Terminology Coordination, based on:Ferrer & Thurman (Editors). Advanced Techniques in Gas Chromatography-Mass Spectrometry (GC-MS-MS and GC-TOF-MS) for Environmental Chemistry, 1st Edition, ISBN: 9780444626233 http://store.elsevier.com/product.jsp?lid=0&iid=73&sid=0&isbn=9780444626240 & http://books.google.fr/books?id=4QZKxfvxg0cC&pg=PA185&lpg=PA185&dq=gc-hrms&source=bl&ots=FfzivaYhkV&sig=9JsR0HM74LNuZQLJKb-EY3Y5Gzs&hl=en&sa=X&ei=0tgWU66oC6SEyAOckoGgDA&ved=0CDwQ6AEwAzgU#v=onepage&q=gc-hrms&f=false [5.3.2014]
    chromatographie gazeuse couplée à la spectrométrie de masse à haute résolution
    fr
    Definition technique d'analyse associant la chromatographie gazeuse [IATE:1350135] à la spectrométrie de masse à haute résolution Reference COM-FR, d'après diverses sources.
    GC-HRMS
    mul
  2. SCIENCE|natural and applied sciences|physical sciences|chemistry|analytical chemistry
    crómatagrafaíocht gháis in éineacht le mais-speictriméadracht agus a dtréimhse choinneála glasáilte Reference Faofa ag an gCoiste Téarmaíochta, www.tearma.ie ;Faomhadh an téarma seo mar chuid de Thionscadal Lex
    ga
    GC-MS-RTL | gas chromatography–mass spectrometry with retention time locking | retention time locked gas chromatography–mass spectrometry
    en
    Comment 'Retention time' is one of the most important chromatographic features for analytical chemists since it is the key parameter to separate, identify and quantify compounds of interest from complex mixtures. Although detectors with higher-dimensional signals ease the identification of many components, there are demanding requirements on the retention time, particularly when high-throughput methods are considered. In addition to this, gas chromatographic elution shows significant run-to-run variations due to fluctuations in temperature and pressure, column degradation or matrix effects. In this sense, different approaches have been developed to minimise those variations: the introduction of electronic pneumatic control (EPC) systems, which allow a very efficient control of the flow of the carrier gas, the use of peak alignment algorithms to treat the chromatograms, or the use of retention-time locking (RTL).
    chromatographie en phase gazeuse avec verrouillage des temps de rétention couplée à une spectrométrie de masse
    fr
  3. SCIENCE|natural and applied sciences|physical sciences|chemistry
    crómatagrafaíocht gháis/mais-speictriméadracht Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
    ga
    GC/MS | Gaschromatographie in Verbindung mit der Massenspektrometrie | Gaschromatographie-Massenspektrometrie | GC-MS | Gaschromatographie/Massenspektrometrie
    de
    Definition Die Gaschromatographie eignet sich zur Bestimmung aller gasförmigen o. unzersetzt verdampfbaren Stoffe, also im wesentlichen von organischen Verbindungen. Eine Probe des zu untersuchenden Stoffgemisches wird in einen Trägergasstrom gebracht und durchströmt eine Trennsäule oder -kapillare mit einer speziellen Füllung bzw. Beschichtung. Stoffabhängige Wechselwirkungen in der Säule bewirken, daß die einzelnen Verbindungen unterschiedlich lange zurückgehalten werden und am Ende der Säule zeitlich getrennt austreten. Zur Detektion der austretenden Komponenten stehen verschiedene Techniken zur Verfügung. Mit einem nachgeschalteten Massenspektrometer lassen sich gleichzeitig Aussagen über Art und Menge der jeweiligen Substanz machen (Identifizierung und Quantifizierung). Dazu werden die austretenden Teilchen ionisiert und die gebildeten Molekülionen, die zum Teil zerfallen, entsprechend ihrem Verhältnis Masse/Ladung in einem Magnetfeld aufgetrennt. Das Muster der auftretenden Fragmente kann einem bestimmten Stoff zugeordnet werden. (Quelle s.o.) Reference ---
    Comment DIV: hym 13/11/2002
    GC-MS | gas chromatography/mass spectroscopy | GC/MS | gas chromatography-mass spectrometry | gas chromatography/mass spectrometry
    en
    Definition two techniques that are combined to form a single method of analyzing mixtures of chemicals Reference George Mason University. Gas Chromatography-Mass Spectroscopy. Background http://www.gmu.edu/departments/SRIF/tutorial/gcd/gc-ms2.htm [17.11.2009]
    Comment Gas chromatography ( IATE:1350135 ) separates the components of a mixture and mass spectroscopy ( IATE:1364881 ) characterizes each of the components individually. By combining the two techniques, an analytical chemist can both qualitatively and quantitatively evaluate a solution containing a number of chemicals.
    chromatographie en phase gazeuse couplée à la spectrométrie de masse | GC/MS | chromatographie gazeuse-spectrométrie de masse
    fr
  4. INDUSTRY|chemistry
    CGMSS Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
    ga
    crómatagrafaiocht gháis in éineacht le mais-speictriméadracht sraithe Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
    ga
    Gaschromatografie/Tandem-Massenspektrometrie | GC-MS/MS
    de
    gas chromatograph-tandem mass spectrometer | gas chromatography-tandem mass spectrometry | gas chromatograph-tandem mass spectrometry
    en
    Definition analytical technique coupling gas chromatography1 to tandem mass spectrometry21 gas chromatography [ IATE:1350135 ]2 tandem mass spectrometry [ IATE:157399 ] Reference COM-Terminology Coordination, based on:Renata Raina and Patricia Hall. Comparison of Gas Chromatography-Mass Spectrometry and Gas Chromatography-Tandem Mass Spectrometry with Electron Ionization and Negative-Ion Chemical Ionization for Analyses of Pesticides at Trace Levels in Atmospheric Samplesy. Anal Chem Insights 2008; 3: 111-125, http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2701172/ [5.3.2014]
    chromatographie en phase gazeuse couplée à la spectrométrie de masse en tandem
    fr
    GC-MS-MS | GC-MS/MS | GC/MS/MS
    mul