Absorbance Calculator

Calculate Absorbance and Beer-Lambert Parameters

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Beer-Lambert Calculator

Calculate absorbance using Beer-Lambert law

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Transmittance Calculator

Convert between absorbance and transmittance

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Molar Absorptivity Calculator

Calculate molar absorptivity coefficient

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Understanding Absorbance

Basic Concepts

Key principles:

  • Beer-Lambert law
  • Absorbance
  • Transmittance
  • Molar absorptivity

Parameters

Important factors:

  • Concentration
  • Path length
  • Wavelength
  • Sample matrix

Limitations

Common issues:

  • High concentrations
  • Scattering
  • Stray light
  • Chemical effects

Applications

Uses in chemistry:

  • Concentration analysis
  • Kinetics studies
  • Quality control
  • Chemical identification

Advanced Topics

Special cases:

  • Multiple components
  • Matrix effects
  • Non-linear behavior
  • Baseline correction

Essential Absorbance Formulas

Beer-Lambert Law

A = εbc

Transmittance

T = I/I₀ = 10⁻ᴬ

Absorbance-Transmittance

A = -log₁₀(T)