Figure 3.
Plots of observed rate constants vs. pH for the reaction of ninhydrin with Gly-Tyr in absence (a) and presence of CTAB (b). Reaction conditions: [CTAB] = 30 × 10−3 mol dm−3, [ninhydrin] = 6.0 × 10−3 mol dm−3, [Gly-Tyr] = 3.0 × 10−4 mol dm−3, temperature = 70 °C.