» Ascorbic Acid contains not less than 99.0 percent and not more than 100.5 percent of C6H8O6.
Packaging and storage Preserve in tight, light-resistant containers.
B: A solution (1 in 50) reduces alkaline cupric tartrate TS slowly at room temperature but more readily upon heating.
Specific rotation 781S: between +20.5 and +21.5, the optical rotation being measured immediately, following the preparation of the solution.
Test solution: 100 mg per mL, in carbon dioxide-free water.
Residue on ignition 281: not more than 0.1%.
Heavy metals 231 Dissolve 1 g in 25 mL of water: the limit is 0.002%.
Assay Dissolve about 400 mg of Ascorbic Acid, accurately weighed, in a mixture of 100 mL of water and 25 mL of 2 N sulfuric acid. Add 3 mL of starch TS, and titrate at once with 0.1 N iodine VS. Each mL of 0.1 N iodine is equivalent to 8.806 mg of C6H8O6.
Auxiliary Information Please check for your question in the FAQs before contacting USP.Chromatographic Column
USP32NF27 Page 1580
Chromatographic columns text is not derived from, and not part of, USP 32 or NF 27.