Discussion on the Factors Affecting the Determination of Chemical Oxygen Demand in Water by Potassium Dichromate Method
Chemical oxygen demand is one of the important indicators of water quality monitoring,and its value can directly reflect the pollution degree of water body.At present,potassium dichromate method is often used to determine chemical oxygen demand in laboratories,but it will be affected by many factors during the experimental operation,which will lead to the deviation of experimental data,thus affecting water quality analysis.Therefore,this paper discusses the digestion time,chloride ion content,cooling time,cooling mode and storage conditions,and analyzes the reasons that affect the determination in detail in order to obtain more accurate analysis data results.
NETL
NSTL
万方数据
维普
