“…Quantitative Fluorometric Microdetermination of Alloxan Monohydrate as Riboflavin R. STUART TIPSON AND LEONARD H. CRETCHER Mellon Institute, Pittsburgh 13,Pa. IN THE course of work on alloxan monohydrate (19,(21)(22)(23), the authors had occasion to ascertain the concentration of very dilute solutions of the compound and to determine the purity of commercial samples. One method tried was that outlined in a note on "preliminary studies leading to a sensitive and specific test for the quantitative estimation of alloxan in pure solution" (2).…”