Rapid and simple spectrophotometric determination of persulfate in water by microwave assisted decolorization of Methylene Blue.
Rapid and simple spectrophotometric determination of persulfate in water by microwave assisted decolorization of Methylene Blue.
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DOI：
10.1016/j.jes.2014.09.036
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发表时间：
2015-05
影响因子：
6.9
通讯作者：
Lajuan Zhao;Shiying Yang;Lei-lei Wang;Chao Shi;Mei Huo;Yan Li
中科院分区：
文献类型：
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作者：
Lajuan Zhao;Shiying Yang;Lei-lei Wang;Chao Shi;Mei Huo;Yan Li
建立了一种快速简便的测定水溶液中过硫酸盐的方法。该方法以国内微波活化过硫酸盐与亚甲基蓝（MB）快速反应为基础，能促进过硫酸盐的活化，对MB进行快速脱色。在644 nm （MB的最大吸收波长）处，MB的损耗与水溶液中过硫酸盐浓度的增加成正比。在0 ~ 1.5 mmol/L范围内获得线性校准曲线，检出限为0.0028 mmol/L。反应时间快（60秒内），比传统方法短得多。与现有的分析方法相比，它不需要任何添加剂，特别是有色的Fe2 +，也不需要对样品进行任何预处理，如pH调整。
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 pH adjustment.