Method for identifying aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid

The invention discloses a method for identifying aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid. The method is characterized by comprising the following steps: taking a 'H2SO4-KIO3-[NiL](ClO4)2-propanedioic acid-H2O2' nonlinear oscillating chemical system as an identification solution, and further distinguishing and identifying the aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid according to oscillation response of the aromatic isomers on the system, wherein L in [NiL](ClO4)2 refers to 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazamacrocyclo-4,11-diene. An oscillation spectrum provided by the identification method is intuitive, and the method is capable of conveniently and rapidly identifying the aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid, can be widely applied to other isomers and is simple in equipment, high in accuracy and easy in operation and observation. 种芳香族同分异构体2-羟基苯甲酸和3-羟基苯甲酸的鉴别方法，其特征在于：应用"HSO-KIO-[NiL](ClO)-丙二酸-HO"非线性化学振荡体系作为鉴别溶液，根据芳香族同分异构体对该体系所产