Isotopic Abundance Calculator

Calculate Isotopic Distributions

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Average Atomic Mass Calculator

Calculate average atomic mass from isotopic abundances

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Isotope Ratio Calculator

Calculate isotope ratios and relative abundances

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Molecular Isotope Calculator

Calculate molecular mass distribution patterns

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Understanding Isotopic Abundance

Basic Concepts

Key principles:

  • Isotopes
  • Natural abundance
  • Mass number
  • Atomic mass

Analysis Methods

Common techniques:

  • Mass spectrometry
  • NMR spectroscopy
  • Isotope ratio MS
  • Radiometric dating

Applications

Uses in chemistry:

  • Geochemistry
  • Environmental studies
  • Nuclear chemistry
  • Forensic analysis

Advanced Topics

Special cases:

  • Isotope fractionation
  • Enrichment processes
  • Radioisotopes
  • Isotope effects

Practical Aspects

Important factors:

  • Sample preparation
  • Instrumental precision
  • Data analysis
  • Error propagation

Essential Isotope Formulas

Average Mass

Avg Mass = Σ(mass × abundance)

Isotope Ratio

R = abundance₁/abundance₂

Percent Abundance

% = (isotope/total) × 100