摘要
实验针对HACH快速测定仪对COD测定的影响因素进行了研究。当重铬酸钾浓度为1.25mol/L时,所测的COD值准确率相对较高;当加热时间大于0.5h的时候,其影响效果不大;当加热温度大于50℃时加热温度对COD值没有太大影响;当硫酸汞∶氯离子=20∶1时,对氯离子能达到比较好的屏蔽效果,使误差降至较低水平。
The influence on the determination of COD was studied by HACH analyzer. When the potassium concentration is 1.25mol/L, the accuracy rate will reached 99% ; when the heating time was more than 0.5h, the changes of result ware less; when the heating temperature was more than 50℃, the changes of result ware less; and the optimal concentration ration（Hg^（2＋）/Cl- ） was 20：1.
出处
《广东石油化工学院学报》
2012年第4期22-26,共5页
Journal of Guangdong University of Petrochemical Technology
