摘要
用重铬酸钾法对化学需氧量进行分析并进行加标回收.建立水质化学需氧量分析的加标方案和方法,提高了分析准确度.加标量一般是待测物含量的0.5~2.0倍.加标物以浓度高、体积小为好,加标物的体积不超过原始试样体积的1%,加标后总含量不超过方法的线性范围最大值.化学需氧量分析的加标回收率为100.3%.
Use the potassium chromate method to analyze COD and carry on the collection of the standard.This method makes a foundation of additional standard plan and method in COD analysis,and can also improve the accuracy of analysis.The amount of additional standard liquid usually is0.5~2.0times as the determinand.It is better to use high concentration and small volume liquid to add,and the volume of the additional liquid need to be less than 1% volume of the original sample.After the addition,the total is no more than the maximum of linear range.The Recovery Ratio of COD analysis is 100.3%.
出处
《辽宁师专学报（自然科学版）》
2015年第2期99-101,108,共4页
Journal of Liaoning Normal College(Natural Science Edition)
关键词
化学需氧量
加标量
加标回收率
COD——Chemical Oxygen Demand
additional standard liquid
Recovery Ratio
作者简介
王红（1984-），女，山东莱芜市人，工程师，主要从事质量控制方面研究．
