isotope dilution

Any technique that involves the addition to a sample of an isotopically labelled compound.

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  • isotope dilution — ▪ chemistry       radiochemical method of analysis for measuring the mass and quantity of an element in a substance. The procedure involves adding to a substance a known quantity of a radioisotope of the element to be measured and mixing it with… …   Universalium

  • DILUTION ISOTOPIQUE — En essayant de séparer le radioplomb (Ra D) du plomb inactif dans un échantillon de plomb, G. de Hevesy s’aperçut que cette séparation était impossible à réaliser par les méthodes habituelles. Il eut l’idée d’utiliser le Ra D fortement dilué dans …   Encyclopédie Universelle

  • Isotopic dilution — is a technique to increase the precision and accuracy of chemical analysis. First, a known amount of an isotope is added to the sample. For example, to determine the amount of lead in a sample, a known amount of Pb 204, one of the isotopes of… …   Wikipedia

  • isotopic dilution — noun any technique that involves the addition to a sample of an isotopically labelled compound Syn: isotope dilution …   Wiktionary

  • ID-MS — isotope dilution mass spectrometry …   Medical dictionary

  • ID-MS — • isotope dilution mass spectrometry …   Dictionary of medical acronyms & abbreviations

  • dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …   Universalium

  • Dimethyltryptamine — Systematic (IUPAC) name 2 (1H indol 3 yl) N …   Wikipedia

  • analysis — /euh nal euh sis/, n., pl. analyses / seez /. 1. the separating of any material or abstract entity into its constituent elements (opposed to synthesis). 2. this process as a method of studying the nature of something or of determining its… …   Universalium

  • mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph …   Universalium

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