Potassium Iodobismuthate Solution R1

Dissolve 100 g of (+)-tartaric acid in 400 mL of water and add 8.5 g of bismuth oxynitrate. Shake for 1 hour, add 200 mL of a 40% w/v solution of potassium iodide and shake well. Allow to stand for 24 hours and filter.

Store protected from light.