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研究发现钴铁氧体纳米粒子可催化H_2O_2氧化对甲苯酚产生荧光物质2,2’-二羟基-4,4’-二甲基联苯,据此建立了测定H2O2的方法.在优化条件下,荧光强度与H_2O_2浓度在1×10-9~1×10-6 mol/L范围内呈现良好的线性关系,H_2O_2的检出限为4.9×10-10 mol/L,对浓度为1×10-7 mol/L和1×10-6 mol/L的H_2O_2平行测定11次,其相对标准偏差(RSD)分别为3.5%和2.1%.该方法已成功用于测定雨水、自来水和江水等水样中的H2O2.
It was found that cobalt ferrite nanoparticles can catalyze the oxidation of p-cresol with H 2 O 2 to produce 2,2’-dihydroxy-4,4’-dimethylbiphenyl, and thus a method of determining H 2 O 2 was established. Under optimized conditions , The fluorescence intensity and H_2O_2 concentration in the range of 1 × 10-9 ~ 1 × 10-6 mol / L showed a good linear relationship, the detection limit of H_2O_2 4.9 × 10-10 mol / L, the concentration of 1 × 10 The relative standard deviations (RSDs) were 3.5% and 2.1%, respectively, for the determination of H_2O_2 (-7 mol / L and 1 × 10-6 mol / L) for 11 times in parallel.The method has been successfully applied to the determination of water, Sample of H2O2.