Abstract
1. Minute amounts of anthranilic acid can be determined color-imetrically after diazotizing and coupling with β-diethylaminoethyl-a-naphthylamine.
2. Free anthranilic acid and conjugated anthranilic acid as glucuronide can be determined separately by the present method.
3. The method has been applied to the measurement of glucuronide synthesis by rat-tissue slices.
It is our pleasurable duty to thank Prof. H. Mabuti for his continued interest and advices given during the course of this investigation.