isotopic tracer

      any radioactive atom detectable in a material in a chemical, biological, or physical system and used to mark that material for study, to observe its progress through the system, or to determine its distribution. An isotopic tracer must behave as does the material being studied, but, in addition, it must have some distinguishing property by which it can be detected in the presence of the other material.

      The movement of a chemical element under study may be traced by adding a radioactive isotope (or radioisotope) of the same element. The radiations emitted by such a radioisotope (radioactive isotope) can be tracked by means of radiation detection devices, such as Geiger-Müller counters or scintillation detectors. Radioisotopes can be detected in quantities as small as a few atoms. Radioactive tracers are widely used in science, engineering, and medicine in virtually any situation in which it is necessary to determine the distribution pattern or the rate of material transport.

       isotope dilution, in which radioisotopes are introduced into stable isotopes of the same element and mixed, is a widely used technique for determining the volume of a system. To measure the contents of the human blood system or of an industrial tank, a minute quantity of radioactive tracer is added and allowed to mix uniformly throughout the system; then a sample of known volume is removed from the system and measured for the amount of radioactive tracer it contains. The ratio of this content to the amount originally introduced is proportional to the volume of the entire system.

* * *


Universalium. 2010.

Look at other dictionaries:

  • isotopic tracer — izotopinis žymeklis statusas T sritis chemija apibrėžtis Radioaktyvusis arba stabilus atomas, kurio nėra (arba yra labai mažai) tiriamos medžiagos izotopų mišinyje. atitikmenys: angl. isotopic indicator; isotopic marker; isotopic tracer; tracer… …   Chemijos terminų aiškinamasis žodynas

  • isotopic tracer — izotopinis indikatorius statusas T sritis fizika atitikmenys: angl. isotope tracer; isotopic indicator; isotopic tracer vok. Indikatorisotop, n; isotoper Indikator, m; Leitisotop, n rus. изотопный индикатор, m pranc. indicateur isotopique, m;… …   Fizikos terminų žodynas

  • isotopic tracer — izotopinis indikatorius statusas T sritis Standartizacija ir metrologija apibrėžtis Medžiaga, kurios izotopinė sudėtis yra kitokia negu gamtinio analogo. atitikmenys: angl. isotopic indicator; isotopic tracer vok. Indikatorisotop, n; isotoper… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • Isotopic labeling — (or isotopic labelling) is a technique for tracking the passage of a sample of substance through a system. The substance is labeled by including unusual isotopes in its chemical composition. If these unusual isotopes are later detected in a… …   Wikipedia

  • Tracer — may refer to: *Histochemical tracer, a substance used for tracing purposes in histochemistry, the study of the composition of cells and tissues *Isotopic tracer, a substance with an isotope that has been enriched to a greater level than that… …   Wikipedia

  • tracer — izotopinis žymeklis statusas T sritis chemija apibrėžtis Radioaktyvusis arba stabilus atomas, kurio nėra (arba yra labai mažai) tiriamos medžiagos izotopų mišinyje. atitikmenys: angl. isotopic indicator; isotopic marker; isotopic tracer; tracer… …   Chemijos terminų aiškinamasis žodynas

  • isotopic indicator — izotopinis žymeklis statusas T sritis chemija apibrėžtis Radioaktyvusis arba stabilus atomas, kurio nėra (arba yra labai mažai) tiriamos medžiagos izotopų mišinyje. atitikmenys: angl. isotopic indicator; isotopic marker; isotopic tracer; tracer… …   Chemijos terminų aiškinamasis žodynas

  • isotopic marker — izotopinis žymeklis statusas T sritis chemija apibrėžtis Radioaktyvusis arba stabilus atomas, kurio nėra (arba yra labai mažai) tiriamos medžiagos izotopų mišinyje. atitikmenys: angl. isotopic indicator; isotopic marker; isotopic tracer; tracer… …   Chemijos terminų aiškinamasis žodynas

  • tracer — /tray seuhr/, n. 1. a person or thing that traces. 2. a person whose business or work is the tracing of missing property, parcels, persons, etc. 3. an inquiry sent from point to point to trace a missing shipment, parcel, or the like, as in a… …   Universalium

  • isotopic indicator — izotopinis indikatorius statusas T sritis fizika atitikmenys: angl. isotope tracer; isotopic indicator; isotopic tracer vok. Indikatorisotop, n; isotoper Indikator, m; Leitisotop, n rus. изотопный индикатор, m pranc. indicateur isotopique, m;… …   Fizikos terminų žodynas

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.