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目的研究一种适用于监测作业场所空气中过氧化氢的测定方法。方法取采样后部分溶液测过氧化氢和其他强氧化物的总量,然后利用过氧化氢在过氧化氢酶的作用下分解成O2和水,使过氧化氢失去氧化性的特点,测另一部分样品溶液加过氧化氢酶后的其他氧化物含量。根据两次测定结果之差,计算样品中过氧化氢的含量。结果过氧化氢浓度在0～10μg／5 mL范围内有良好的线性关系,方法的相对标准偏差<1．2％,加标回收率99．3％～102％,定量检测限为0．08μg/mL。最低检测浓度(采样体积为15 L时)为0．053 mg／m3。结论该方法适用于作业场所空气中过氧化氢的测定。
AIM To study a method for the determination of hydrogen peroxide in the workplace air. Methods After the sample solution was taken to measure the total amount of hydrogen peroxide and other strong oxides, and then the use of hydrogen peroxide in the role of catalase decomposition of O2 and water, so that the loss of oxidation of hydrogen peroxide characteristics, measured separately Part of the sample solution plus catalase after the other oxide content. Based on the difference between the two measurements, calculate the content of hydrogen peroxide in the sample. Results There was a good linear relationship between the concentration of hydrogen peroxide and 0 ~ 10μg / 5mL. The relative standard deviation (RSD) was less than 1.2%, the recoveries were 99.3% ~ 102%, and the limit of quantification was 0.08μg / mL. The lowest detection concentration (at a sample volume of 15 L) was 0.053 mg / m3. Conclusion This method is suitable for the determination of hydrogen peroxide in the workplace air.