Preparation and Standardization of 0.1 M Ferrous Ammonium Sulphate : Pharmaguideline

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Preparation and Standardization of 0.1 M Ferrous Ammonium Sulphate

Preparation and standardisation of 0.1 M Ferrous Ammonium Sulphate using Ceric Ammonium Sulphate and Orthophenanthroline solution as indicator that is used in pharmaceutical analysis.

Ferrous Ammonium Sulphate Solution Preparation

  • Dissolve 40 g of ferrous ammonium sulfate in a previously cooled mixture of 40 ml of sulphuric acid and 200 ml of water.
  • Dilute with sufficient freshly boiled and cooled water to produce 1000 ml.
  • Standardize the solution in the following manner.

Ferrous Ammonium Sulphate Solution Standardization

  • Measure accurately 25.0 ml of the solution into a flask.
  • Add 2 drops of Orthophenanthroline solution.
  • Titrate with 0.1 M ceric ammonium sulfate until the red color is changed to pale blue.
  • 1 ml of 0.1 M ceric ammonium sulfate is equivalent to 0.03921g of Fe(NH4)2(SO4)2.6H2O.
Also see: Determination of Shelf Life of Solutions in Laboratory

Ankur Choudhary is India's first professional pharmaceutical blogger, author and founder of, a widely-read pharmaceutical blog since 2008. Sign-up for the free email updates for your daily dose of pharmaceutical tips.
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