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Assay of Ferrous sulphate IP Pharmaceutical Analysis I Practical


Pharmaceutical Analysis I Practical: Limit test for (1) Chloride (2) Sulphate (3) Iron (4) Arsenic Preparation and standardisation of (1) Sodium hydroxide (2) Sulphuric acid (3) Sodium thiosulfate (4) Potassium permanganate (5) Ceric ammonium sulphate Assay (1) Ammonium chloride (2) Ferrous sulphate(3) Copper sulphate (4) Calcium gluconate (5) Hydrogen peroxide (6) Sodium benzoate (7) Sodium Chloride Determination of Normality (1) Conductometric titration of strong acid against a strong base (2) Conductometric titration of strong acid and weak acid against a strong base (3) Potentiometric titration


Aim

To determine the percent purity of Ferrous sulfate in a given sample

Principle

This determination is cerimetric type of redox titration. Ceric ammonium nitrate is a strong oxidizing agent that oxidizes ferrous ions to ferric ions and undergoes reduction to convert from ceric ion to cerous ion. Ferroin sulfate is used as an indicator which is a red-coloured complex of ferrous ions with 1, 10- phenanthroline. At the equivalence point excess of ceric ions converts ferrous in ferroin to ferric which changes the colour of the solution from red to light green colour

Standard

Ferrous sulphate contains not less than 98% and not more than 105 % of FeSO4.7H2O

Procedure

Dissolve 2.5g of sodium bicarbonate in a mixture of 150 ml of water and 10 ml of sulphuric acid. When effervescence ceases, add about 0.5 g of substance under examination, accurately weighed, shake gently to dissolve, and titrate with 0.1 M Ceric ammonium nitrate using 0.1 ml of ferroin solution as an indicator until the red colour disappears

Reference

Indian Pharmacopoeia 2014; Vol. II; Pg. No. 1753-1754.


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BP101T Human Anatomy and Physiology I TheoryBP201T Human Anatomy and Physiology II – Theory
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BP105T Communication skills TheoryBP205T Computer Applications in Pharmacy Theory
BP106RBT Remedial BiologyBP206T Environmental sciences – Theory
BP106RMT Remedial Mathematics TheoryBP207P Human Anatomy and Physiology II Practical
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BP108P Pharmaceutical Analysis I PracticalBP209P Biochemistry Practical
BP109P Pharmaceutics I PracticalBP210P Computer Applications in Pharmacy Practical
BP110P Pharmaceutical Inorganic Chemistry Practical
BP111P Communication skills Practical
BP112RBP Remedial Biology Practical

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