离子色谱仪流动注射电导法测定过氧化氢  

Determination of Hydrogen Peroxide Using Flow Injection Analysis-Conductivity Method with Ion Chromatography

作　　者：王凯雄[1] 许利君[1] 姚铭[1] 朱岩[2] 

机构地区：[1]浙江大学环境与资源学院环境工程系,杭州310029 [2]浙江大学理学院化学系,杭州310028

出　　处：《分析化学》2003年第5期555-558,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助项目(No.20247001)

摘　　要：以H2SO3与H2O2反应生成H2SO4产生的电导变化与H2O2的量呈线性关系为理论依据,根据流动注射原理将现有离子色谱仪进行改装成流动注射仪测定过氧化氢。此方法有很好的重现性,8次进样所得相对标准偏差小于2.6％,所得结果稳定,其检测下限为0.5 mg,L,标准曲线的相关系数达0.9995。本实验对某些分析条件,诸如H2SO3,的浓度和流速、样品用量及反应管长度等因素进行了探讨。由于实际样品中存在不同离子而具有不同背景电导,因而在测定实际样品时采用经过过氧化氢酶处理的样品作空白,以此消除背景电导的干扰。A new method for the determination of hydrogen peroxide using a modified ion chromatograph based. on the flow injection analysis principle was developed. H2SO3 was used as carrier liquid which reacted with H2O2 to produce H2SO4 and the conductivity change between H2SO3 and H2SO4 has a good linearity with the concentration of hydrogen peroxide. The results show that the repeatability of 8 times is less than 2.6%, the lowest detectable concentration is 0.5 mg/L and the correlation coefficient of the standard curve is 0.9996. The effects of H2SO3 concentration, injection volume, reactor length on the results were also discussed. In order to eliminate the interference of the conductivity of other ions in water catalase was used to analyze the H2O2 for blank.

关 键 词：离子色谱仪 流动注射电导法 测定 过氧化氢 亚硫酸 分析 

分 类 号：O657.7[理学—分析化学]