化学需氧量(COD)测定仪示值误差测得值不确定度的评定

Evaluation of Uncertainty of Indication Error of Chemical Oxygen Demand(COD)Meters

依据JJG975-2002《化学需氧量(COD)测定仪检定规程》及JJF1059.1-2012《测量不确定度的评定与表示》对分光光度原理A类仪器及电化学原理B类仪器,按规程要求各校准点示值误差测得值不确定度进行了评定,评定过程真实有效,可为相关机构技术人员在检定/校准化学需氧量测定仪中评定示值误差测得值的不确定度提供参考。

According to JJG 975-2002 "V.R.of Chemical Oxygen Demand(COD) Meters" and JJF 1059.1-2012 "Evaluation and Expression of Uncertainty in Measurement", this paper evaluates the uncertainty of measurement results of indication error of each calibration point of class a instrument based on the principle of spectrophotometry and class B instrument based on the principle of electrochemistry according to the requirements of regulations.The evaluation process is real and effective, It can provide reference for technicians of relevant institutions to evaluate the uncertainty of indication error measurement results in the verification/calibration of COD meters.