Rapid and simple spectrophotometric determination of persulfate in water by microwave assisted decolorization of Methylene Blue  

作　　者：Lajuan Zhao Shiying Yang Leilei Wang Chao Shi Meiqing Huo Yan Li 

机构地区：[1]Key Laboratory of Marine Environment and Ecology, Ministry of Education [2]College of Environmental Science and Engineering, Ocean University of China [3]Qingdao Shuiqingmuhua Environmental Engineering Co., Ltd.

出　　处：《Journal of Environmental Sciences》2015年第5期235-239,共5页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 21107101)

摘　　要：A rapid and simple method for determination of persulfate in aqueous solution was developed. The method is based on the rapid reaction of persulfate with Methylene Blue（MB） via domestic microwave activation, which can promote the activation of persulfate and decolorize MB quickly. The depletion of MB at 644 nm（the maximum absorption wavelength of MB） is in proportion to the increasing concentration of persulfate in aqueous solution. Linear calibration curve was obtained in the range 0-1.5 mmol/L, with a limit of detection of 0.0028 mmol/L. The reaction time is rapid（within 60 sec）, which is much shorter than that used for conventional methods. Compared with existing analytical methods, it need not any additives, especially colorful Fe2＋, and need not any pretreatment for samples, such as p H adjustment.A rapid and simple method for determination of persulfate in aqueous solution was developed. The method is based on the rapid reaction of persulfate with Methylene Blue（MB） via domestic microwave activation, which can promote the activation of persulfate and decolorize MB quickly. The depletion of MB at 644 nm（the maximum absorption wavelength of MB） is in proportion to the increasing concentration of persulfate in aqueous solution. Linear calibration curve was obtained in the range 0-1.5 mmol/L, with a limit of detection of 0.0028 mmol/L. The reaction time is rapid（within 60 sec）, which is much shorter than that used for conventional methods. Compared with existing analytical methods, it need not any additives, especially colorful Fe2＋, and need not any pretreatment for samples, such as p H adjustment.

关 键 词：Decolorization Methylene Blue Microwave activation Persulfate Spectrophotometric determination 

分 类 号：X832[环境科学与工程—环境工程]