摘要
分光光度法适用于地表水、地下水、饮用水等净水中高锰酸盐指数的测定。该方法的精密度和准确度指标能达到预期的要求。该方法存在样品使用量比较少,和试剂用量小、分析时间短、精密度准确度比较高、有利于大量分析样品等优点。CODMn是以KMnO4作为氧化剂,随着温度的升高,该反应的速率增大,反应进行的程度加深。该论文利用分光光度法测定水中高锰酸盐指数对加热温度进行研究,结果显示92℃为本实验的加热温度,利用标准样品进行准确度控制,在标准值范围内,精密度满足方法要求。
Spectrophotometric method is suitable for the determination of permanganate index in clean water such as surface water,groundwater and drinking water.The precision and accuracy of the method can meet the expected requirements.The method has the advantages of small sample and reagent dosage,short analysis time,good precision and is suitable for batch analysis.CODMnis a method to use KMnO4 as oxidant,with the increase of temperature,the rate of this reaction increases and the degree of reaction is deepened.This paper studies on determining heating temperature of permanganate index in water with spectrophotometric method,and the results show that 92℃is the heating temperature of this experiment.Standard samples are used for accuracy control.Within the range of standard values,precision meets the requirements of the method.
作者
金晶
刘蕊
Jin Jing(Institute of Metrology Verification and Testing of Heilongjiang Province Harbin Heilongjiang 150036)
出处
《黑龙江环境通报》
2018年第4期73-75,88,共4页
Heilongjiang Environmental Journal
关键词
分光光度法
高锰酸盐指数
加热温度研究
Spectrophotometric method
Permanganate index
Heating temperature research
