The bromination of acetone. Application to multicomponent kinetic determinations

摘要

A very simple kinetic method is proposed for the resolution of mixtures of acetone and a second component. It is based on the reaction, at constant temperature, between bromine and acetone. This reaction can be regarded, under certain conditions, as pseudo-zero-order on the bromine concentration. To show the possibilities of the method, mixtures of acetone (between 2 and 20 * 10~(-4) mol L~(-1)) and either hydroquinone (between 0.4 and 2.2 * 10~(-4) mol L~(-1)) or resorcinol (between 0.1 and 0.7 * 10~(-4) mol L~(-1)) have been used with the concentration ratios acetone:hydroquinone ranging between 0.5 and 50 and acetone:resorcinol ranging between 2.8 and 200. No systematic errors were found to exist (90 confidence level) and random errors were mainly under 5. The method can be extended to mixtures of acetone and a second component whose reaction with bromine is fast (phenols, aromatic amines, etc.).