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SPECTROMETRIE MASSE RAPPORTS ISOTOPIQUES [1 record]
Record 1 - internal organization data 2019-06-07
Record 1, English
Record 1, Subject field(s)
- Analytical Chemistry
- Physics
Record 1, Main entry term, English
- isotope ratio mass spectrometry
1, record 1, English, isotope%20ratio%20mass%20spectrometry
correct
Record 1, Abbreviations, English
- IRMS 1, record 1, English, IRMS
correct
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
... a specialized technique used to provide information about the geographic, chemical, and biological origins of substances. 1, record 1, English, - isotope%20ratio%20mass%20spectrometry
Record number: 1, Textual support number: 1 OBS
The ability to determine the source of an organic substance stems from the relative isotopic abundances of the elements which comprise the material. Because the isotope ratios of elements such as carbon, hydrogen, oxygen, sulfur, and nitrogen can become locally enriched or depleted through a variety of kinetic and thermodynamic factors, measurement of the isotope ratios can be used to differentiate between samples which otherwise share identical chemical compositions. 1, record 1, English, - isotope%20ratio%20mass%20spectrometry
Record 1, French
Record 1, Domaine(s)
- Chimie analytique
- Physique
Record 1, Main entry term, French
- spectrométrie de masse de rapports isotopiques
1, record 1, French, spectrom%C3%A9trie%20de%20masse%20de%20rapports%20isotopiques
correct, feminine noun
Record 1, Abbreviations, French
- SMRI 1, record 1, French, SMRI
correct, feminine noun
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
De nombreuses méthodes de contrôle basées sur la détermination des teneurs en isotopes stables ont ainsi vu le jour. Ces méthodes utilisent principalement deux techniques analytiques : 1- La spectrométrie de masse de rapports isotopiques (SMRI), qui permet la mesure des teneurs moyennes en isotopes stables d'un composé organique choisi comme cible. Ainsi, la mesure des déviations isotopiques des isotopes lourds des cinq éléments majeurs de la matière organique (H, C, N, O, S) est aisément réalisée à l'aide de spectromètres dédiés à ces applications. 1, record 1, French, - spectrom%C3%A9trie%20de%20masse%20de%20rapports%20isotopiques
Record 1, Spanish
Record 1, Textual support, Spanish
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