Abstract Comparative reactivities of different metal ions in different micellar solutions (cationic, anionic, nonionic micelle) for the hydrolysis of p‐nitrophenyl picolinate (PNPP) were investigated spectrophotometrically at pH 7.0 and 25°C. The kinetics analysis was carried out by invoking a model of micellar catalysis. The results show that compared with metal ions in aqueous solution, cationic micelles inhibit metal ion catalyzed hydrolysis of PNPP, anionic micelles accelerate metal ion catalyzed hydrolysis of PNPP and nonionic micelles s...
