流动注射化学发光法测定面粉中过氧化苯甲酰

Determination of Benzoyl Peroxide in Flour by Flow Injection Chemiluminescence Method

目的:建立面粉中过氧化苯甲酰含量测定的化学发光新方法。方法:过氧化苯甲酰氧化KI生成I2,该反应和luminol-H2O2化学发光体系相耦合,进而对面粉中的过氧化苯甲酰进行测定。结果:方法的线性范围为3.0×10-8～4.0×10-6g/mL,检出限为4.0×10-9g/mL,RSD为2.2%(质量浓度5.0×10-8g/mL,11次平行测定)。结论:该方法具有简单、灵敏、线性范围宽的优点。

Objective： To develop a new flow injection chemiluminescence method for determining benzoyl peroxide in flour. Methods： KI can be oxidized by benzoyl peroxide to produce I2. This reaction is coupled with a luminal-H2O2 chemiluminescence system to determine benzoyl peroxide in flour. Results： The determination range of this method is 3.0 × 10^-8-4.0 × 10^-6 g/mL, and the detection limit of this method is 4.0 × 10^-9 g/mL with a relative standard deviation of 2.2%. Conclusion： This method is characteristics of simple, high selectivity, accuracy and sensitivity.