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Principles and applications of Cerimetry

Cerimetry is a type of redox titration that involves the use of cerium(IV) as the oxidizing agent. It is based on the principle that cerium(IV) ions can be reduced to cerium(III) ions by a variety of reducing agents, including iodides, thiosulfates, and oxalic acid. The endpoint of the titration is determined by the disappearance of the yellow color of the cerium(IV) ion, which is due to its reduction to the colorless cerium(III) ion.

The basic principle of cerimetry is similar to other redox titration methods, in which the equivalence point is reached when the number of electrons lost by the oxidizing agent is equal to the number of electrons gained by the reducing agent. The concentration of the reducing agent can be calculated from the volume and concentration of the cerium(IV) solution used in the titration.

Cerimetry has a wide range of applications in analytical chemistry, including:

  1. Determination of iodine: Cerimetry can be used for the determination of iodine in a variety of samples, including pharmaceuticals, food products, and environmental samples. Iodide ions react with cerium(IV) ions to form iodine, which is then titrated with a standard solution of sodium thiosulfate.
  2. Determination of sulfite: Cerimetry can also be used for the determination of sulfite, which is commonly used as a preservative in food products. Sulfite reacts with cerium(IV) ions to form cerium(III) ions, which is then titrated with a standard solution of iodine.
  3. Determination of oxalic acid: Cerimetry can be used for the determination of oxalic acid, which is commonly used as a reductant in a variety of chemical reactions. Oxalic acid reacts with cerium(IV) ions to form cerium(III) ions, which is then titrated with a standard solution of potassium permanganate.
  4. Determination of iron: Cerimetry can also be used for the determination of iron in a variety of samples, including ores, soils, and water samples. Iron reacts with cerium(IV) ions to form cerium(III) ions, which is then titrated with a standard solution of potassium permanganate.

Overall, cerimetry is a versatile and widely used analytical method in the determination of various analytes, particularly those that can be reduced by cerium(IV) ions.

First Year B Pharm Notes, Syllabus, Books, PDF Subjectwise/Topicwise

F Y B Pharm Sem-IF Y B Pharm Sem-II
BP101T Human Anatomy and Physiology I TheoryBP201T Human Anatomy and Physiology II – Theory
BP102T Pharmaceutical Analysis I TheoryBP202T Pharmaceutical Organic Chemistry I Theory
BP103T Pharmaceutics I TheoryBP203T Biochemistry – Theory
BP104T Pharmaceutical Inorganic Chemistry TheoryBP204T Pathophysiology – Theory
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
BP107P Human Anatomy and Physiology PracticalBP208P Pharmaceutical Organic Chemistry I Practical
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

Suggested readings:

  • Metal ion indicators in Complexometric titration
  • 407P Physical Pharmaceutics II Practical
  • Volhard’s method in Precipitation titrations
  • 306P Physical Pharmaceutics I Practical
  • Classification of Complexometric titration

B Pharmacy Notes (Subjectwise/Topicwise)

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D Pharmacy Notes (Subjectwise/Topicwise)

  • 1st Year D Pharmacy
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