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0.8 Beer-Lambert Law

Lesson Summary

Absorbance = εcl

  • ε = molar extinction coefficient (molar absorptivity) Note: Things that are brightly-colored have higher ε values
  • c = sample’s concentration
  • l = path length (distance between the light source and the detector in a spectrophotometer)
  • Hint: If you know the absorbance of a solution, you can calculate its concentration