• British Pharmacopoeia Volume V
  • Appendices
  • Appendix I B. Volumetric Reagents and Solutions
  • Volumetric Solutions

Cerium(iv) Sulfate VS
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Cerium(iv) Sulfate VS Cerium(iv) Sulphate VS, Cerium sulfate; Ce(SO4)2,4H2O = 404.3

For a 0.1m solution Dissolve 40.4 g of cerium(iv) sulfate in a mixture of 500 mL of water and 50 mL of sulfuric acid (96% w/w). Allow to cool and dilute to 1000 mL with water.

Ascertain its exact concentration immediately before use in the following manner. To 20.0 mL of the cerium sulfate solution, add 1.6 g of potassium iodide, 100 mL of water and 40 mL of dilute sulfuric acid. Titrate immediately with 0.1m sodium thiosulfate VS using 0.8 mL of starch solution as indicator. Each mL of 0.1m sodium thiosulfate VS is equivalent to 40.43 mg of Ce(SO4)2,4H2O.