钛盐光度法测定Fenton氧化中的过氧化氢

采用钛盐光度法测定Fenton高级氧化中的过氧化氢,是基于在酸性介质中过氧化氢与钛离子生成稳定的橙色络合物的原理,通过分光光度法测定过氧化氢的含量.对钛盐用量、显色时间、溶液酸度和干扰离子等因素对测定结果的影响进行了分析,并在蒸馏水、存在有机物和Fenton高级氧化体系中,对高锰酸钾法、碘量法和钛盐光度法测定过氧化氢进行了对比试验.结果表明,钛盐光度法具有简便、准确、选择性好的特点,能有效克服氧化还原方法的缺陷.

Spectrophotometric Determination of Hydrogen Peroxide in Fenton Reaction with Titanium Oxalate

Spectrophotometry was used for determination of hydrogen peroxide in Fenton reaction with titanium oxalate. In the method, the hydrogen peroxide was reacted with titanium in acidic media to form a steady and orange complex for determination of H2O2 content by spectrophotometry. The influence of factors such as titanium oxalate dosage, coloration period, acidity of solution and interfering ion on the measurement result was investigated. The titanium oxalate method was compared with other methods, suchas potassium permanganate method and iodometry method in the distilled water systems, and the ad- vanced oxidation system with organic compound and Fenton reagent. The resuh shows that the titanium oxalate method is characterized by simple, accurate, and good selectivity, and can effectively eliminate the drawbacks to the redox process.