[The Ascorbic Acid Reference Standard (Control 931) of the National Institute of Health Sciences].

Abstract

Raw ascorbic acid material was tested for preparation of the "Ascorbic Acid Reference Standard (Control 931)". Analytical data obtained were as follows: infrared spectrum, the same as that of the JP Ascorbic Acid Reference Standard; optical rotation -alpha-20D, + 21.4 degrees; melting point, 190.3 degrees C (decomposition); loss on drying, 0.02%; assay result, 100.1% by iodometry. Based on the above findings, the raw material was authorized as the JP Ascorbic Acid Reference Standard (Control 931).