TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

IRMS [4 records]

Record 1 2019-06-07

English

Subject field(s)
  • Analytical Chemistry
  • Physics
DEF

... a specialized technique used to provide information about the geographic, chemical, and biological origins of substances.

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.

French

Domaine(s)
  • Chimie analytique
  • Physique
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.

Spanish

Save record 1

Record 2 - external organization data 2017-07-14

English

Subject field(s)
  • Compartment - Royal Canadian Mounted Police (RCMP)

French

Domaine(s)
  • Tiroir - Gendarmerie royale du Canada (GRC)

Spanish

Save record 2

Record 3 2000-10-30

English

Subject field(s)
  • System Names
  • Economic Co-operation and Development

French

Domaine(s)
  • Noms de systèmes
  • Coopération et développement économiques

Spanish

Save record 3

Record 4 1991-03-28

English

Subject field(s)
  • Organizations, Administrative Units and Committees

French

Domaine(s)
  • Organismes, unités administratives et comités

Spanish

Save record 4

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