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double isotopic dilution

См. также в других словарях:

  • 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

  • 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

  • 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

  • Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

  • Isotopes of calcium — Calcium (Ca) has four stable isotopes (40Ca and 42Ca through 44Ca), plus two more isotopes (46Ca and 48Ca) that have such long half lives that for all practical purposes they can be considered stable. It also has a cosmogenic isotope, radioactive …   Wikipedia

  • Inductively coupled plasma mass spectrometry — ICP MS Instrument Acronym ICP MS Classification Mass spectrometry Analytes atomic and polyatomic species in plasma, with exceptions; usually inte …   Wikipedia

  • 7440-59-7 — Hélium Traduction à relire Helium → …   Wikipédia en Français

  • E939 — Hélium Traduction à relire Helium → …   Wikipédia en Français

  • Helium — Hélium Traduction à relire Helium → …   Wikipédia en Français

  • Hélium — Pour les articles homonymes, voir Helium (homonymie). Hélium Hydrogène ← Hélium → …   Wikipédia en Français

  • Hélium 4 — Hélium Traduction à relire Helium → …   Wikipédia en Français

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