分光光度法测定氢氧化钠中氯酸钠含量的改进

Improvement in spectrophotometric determination ofsodium chlorate content in sodium hydroxide

分析现行标准GB/T11200.1—2006《工业用氢氧化钠氯酸钠含量测定邻-联甲苯胺分光光度法》存在的不足。对标准中介绍的方法进行了研究、探索,提出优化改进措施。重新探索了分光光度法的试验装置、试验条件、过程参数、曲线设置等,给出了改进方法。用改进后的方法测定氢氧化钠中氯酸钠含量,操作简单、数据重复性好、测定结果准确,提高了分析效率。

An analysis was conducted on the shortcomings of the current standard GB/T 11200.1-2006 Sodium hydroxide for industrial use-Determination of sodium chlorate content-o-Toluidine spectrometric method.The author has conducted research and exploration on the methods introduced in the standard,and proposed optimization and improvement measures.The author has explored the experimenta1l setup,experimental conditions,process parameters,and1curvesettings of spectrophotometry,and established an improved method.The improved method for determiningthe sodium chlorate content in sodium hydroxide had the advantages of simple operation,good data repeatability,accurate determination results,and improved analytical efficiency.