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composition

Water content (Karl Fischer)

How much of the powder is water?

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it answers

Water as % of the powder.

it cannot tell you

  • Peptide identity or purity.

Method

Karl Fischer titration. Water as % of the powder.

technique
Karl Fischer

Often combined with

  1. Counter-ion TFA · acetate
  2. Content per vial mg per vial
  3. Purity HPLC-UV

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