METHOD AND DEVICE FOR PULSED-LASER MASS SPECTROMETRY

The invention relates to a method for identifying an analyte on a surface contaminated with various chemical compounds or biological agents and determining the chemical composition thereof in real time, using mass spectrometry, and to a device for applying said method. According to the invention, th...

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Main Authors DIPLASU CONSTANTIN, TĂUTAN MARINA, SAVASTRU DAN, POPESCU AURELIAN, MICLOŞ SORIN, SURMEIAN AGAVNI, GROZA ANDREEA, GANCIU MIHAI, TENCIU DANIEL
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LanguageEnglish
Romanian
Published 28.08.2015
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Abstract The invention relates to a method for identifying an analyte on a surface contaminated with various chemical compounds or biological agents and determining the chemical composition thereof in real time, using mass spectrometry, and to a device for applying said method. According to the invention, the method consists in sweeping out the sample surface with a flux of metastable atoms interacting with the analyte molecules desorbed from the sample surface by irradiation with a pulsed laser beam, converting them into ionized molecules which are sucked in and analyzed by a mass spectrometer. The device for applying the method, as claimed by the invention, comprises a source () of metastable atoms, the operation of which is ensured by a circulating gas flow coming from a reservoir () through a pipe (), an electrical discharge taking place in the said gas flow, due to a high voltage source () which generates a flux of atoms/ionized molecules () sweeping the sample () placed on a support (), the sample surface being irradiated with a laser beam (), the so-generated flux of atoms/ionized molecules being then sucked in a mass spectrometer () through a funnel (). Invenţia se referă la o metodă pentru depistarea şi determinarea compoziţiei chimice a unui analit de pe o suprafaţă contaminată cu diverşi compuşi chimici sau agenţi biologici, în timp real, folosind spectrometria de masă, şi la un dispozitiv care aplică metoda. Metoda conform invenţiei constă în spălarea suprafeţei probei cu un flux de atomi metastabili ce interacţionează cu moleculele analitului desorbite de pe suprafaţa probei prin iradierea cu un fascicul laser în impulsuri, transformându-le în molecule ionizate ce sunt aspirate şi analizate de un spectrometru de masă. Dispozitivul pentru aplicarea metodei conform invenţiei este alcătuit dintr-o sursă () de atomi metastabili, a cărei funcţionare este asigurată de un flux de gaz circulant provenit de la un rezervor (), printr-o conductă (), flux în care se asigură o descărcare electrică creată de o sursă () de înaltă tensiune, care generează un flux de atomi/molecule () ionizate ce spală proba () amplasată pe un suport (), suprafaţa probei fiind iradiată cu un fascicul () laser, fluxul de atomi/molecule ionizate astfel generat fiind aspirat într-un spectrometru () de masă, printr-o pâlnie ().
AbstractList The invention relates to a method for identifying an analyte on a surface contaminated with various chemical compounds or biological agents and determining the chemical composition thereof in real time, using mass spectrometry, and to a device for applying said method. According to the invention, the method consists in sweeping out the sample surface with a flux of metastable atoms interacting with the analyte molecules desorbed from the sample surface by irradiation with a pulsed laser beam, converting them into ionized molecules which are sucked in and analyzed by a mass spectrometer. The device for applying the method, as claimed by the invention, comprises a source () of metastable atoms, the operation of which is ensured by a circulating gas flow coming from a reservoir () through a pipe (), an electrical discharge taking place in the said gas flow, due to a high voltage source () which generates a flux of atoms/ionized molecules () sweeping the sample () placed on a support (), the sample surface being irradiated with a laser beam (), the so-generated flux of atoms/ionized molecules being then sucked in a mass spectrometer () through a funnel (). Invenţia se referă la o metodă pentru depistarea şi determinarea compoziţiei chimice a unui analit de pe o suprafaţă contaminată cu diverşi compuşi chimici sau agenţi biologici, în timp real, folosind spectrometria de masă, şi la un dispozitiv care aplică metoda. Metoda conform invenţiei constă în spălarea suprafeţei probei cu un flux de atomi metastabili ce interacţionează cu moleculele analitului desorbite de pe suprafaţa probei prin iradierea cu un fascicul laser în impulsuri, transformându-le în molecule ionizate ce sunt aspirate şi analizate de un spectrometru de masă. Dispozitivul pentru aplicarea metodei conform invenţiei este alcătuit dintr-o sursă () de atomi metastabili, a cărei funcţionare este asigurată de un flux de gaz circulant provenit de la un rezervor (), printr-o conductă (), flux în care se asigură o descărcare electrică creată de o sursă () de înaltă tensiune, care generează un flux de atomi/molecule () ionizate ce spală proba () amplasată pe un suport (), suprafaţa probei fiind iradiată cu un fascicul () laser, fluxul de atomi/molecule ionizate astfel generat fiind aspirat într-un spectrometru () de masă, printr-o pâlnie ().
Author SURMEIAN AGAVNI
SAVASTRU DAN
TĂUTAN MARINA
DIPLASU CONSTANTIN
POPESCU AURELIAN
TENCIU DANIEL
GROZA ANDREEA
MICLOŞ SORIN
GANCIU MIHAI
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DocumentTitleAlternate METODĂ ŞI DISPOZITIV PENTRU SPECTROMETRIA DE MASĂ CU LASER ÎN IMPULSURI
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RelatedCompanies INSTITUTUL NAŢIONAL DE CERCETARE-DEZVOLTAREPENTRU FIZICA LASERILOR, PLASMEI ŞI RADIAŢIEI
INSTITUTUL NAŢIONAL DE CERCETARE-DEZVOLTAREPENTRU OPTOELECTRONICĂ - INOE 2000
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Snippet The invention relates to a method for identifying an analyte on a surface contaminated with various chemical compounds or biological agents and determining the...
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SourceType Open Access Repository
SubjectTerms BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
Title METHOD AND DEVICE FOR PULSED-LASER MASS SPECTROMETRY
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