阳离子表面活性剂协同增敏动力学光度法测定消毒液中过氧乙酸

Kinetic spectrophotometry determination of trace peracetic acid in disinfectant solution with synergistic sensitization effect of cationic surfactants

目的建立过氧乙酸对铁（Ⅱ）-邻二氮杂菲分光光度法测定微量过氧乙酸的新方法。方法在稀硫酸介质中,过氧乙酸对Fe（Ⅱ）-邻二氮杂菲体系的显色反应有明显的阻抑作用,在510 nm波长处测量阻抑体系吸光度值。结果过氧乙酸浓度在0.05～1.5μg/ml范围内与吸光度递减呈良好的线性关系,检出限0.02μg/ml。结论过氧乙酸对铁（Ⅱ）-邻二氮杂菲分光光度法测定微量过氧乙酸的新方法,用于测定消毒液中过氧乙酸结果满意。

Objective To establish the spectrophotometric method of peracetic acid and Iron（ II）- Orthophenanthroline system for determination of traces of peracetic acid. Methods In dilute sulphuric acid medium,the chromogenic reaction of peracetic acid and Iron（ II）- Orthophenanthroline system had obvious inhibitory effect. So the absorbance value in suppression system was measured in 510 nm wavelength. Results The concentration between 0. 05 ～ 1. 5 g / m L of peracetic acid had good linear relationship with the absorbance decreasing,and the detection limit was 0. 02 μg / ml. Conclusion The new method with Iron（ II）- Orthophenanthroline system used in the determination of disinfectant peracetic acid has satisfactory results.