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Keywords chemical oxyen demand;standard curre;error; 化学需氧量;标准曲线;误差;
Dichromate method is a common method to determine chemical oxyen demand,which is also the stipulated method in state standard GB11914-89,but the calculation of its uncertainty was never reported. 重铬酸钾法测定化学需氧量是常用的测定化学需氧量的方法,也是国家标准GB11914-89中规定的方法,但对该方法的不确定度的计算尚未见报道。
his paper expounds tlie linear correlation of biochemical oxyen demand and chemical oxven demand for some certain wastewater,if the COD is kmown,then the BOD5 can be cacuhted. 阐述了某些特定废水中生化需氧量与化学需氧量两者之间具有线性相关关系，因此已知化学需氧量值就可推算出生化需氧量值。
Keywords chemical oxygen demand;rapid determination;potassium dichromate; 化学耗氧量;快速测定;重铬酸钾;
Keywords chemical composition;ANNs;fast testing; 化学成分;人工神经网络;快速检测;
Keywords chemical fiber;winder;traverser;winding; 化纤长丝;卷绕机;横动机构;卷绕;
Keywords Chemical injury;Limbal transplantation; 化学伤;角膜缘移植术;
Keywords chemical fertilizer;nuisanceless food; 化肥;无公害食品;
Keywords chemical learning;visuospatial ability; 化学学习;视觉空间能力;
Keywords chemical teaching;STS education;research; 化学教学;STS教育;研究;
Keywords chemical cleaning;inhibitor;passivator; 化学清洗;缓蚀剂;钝化剂;
Keywords Chemical testing;GLP;Assessment; 化学品测试;GLP实验室;考核评估;
Keywords Chemic cleanser;Oxygen pipe;Derusting;Degreasing; 化学清洗剂;氧气管道;除锈;脱脂;
Keywords chemical oxygen demand;serpentine;catalytic oxidation;disposal of wastewater;experiment; 化学耗氧量;蛇纹石;催化氧化体系;污水处理;实验;
Keywords chemical oxygen demand;testing agent;substitute;water quality monitoring;potassium dichromate; 化学需氧量;测试剂;替代品;水质监测;重铬酸钾;
Keywords chemical oxygen demand;tannin;deg radation;strain;isolation;ident ification; 化学需氧量;单宁;降解;菌种;分离;鉴定;
Keywords chemical coaglulation;catalytic oxydation;dyeing sewage; 化学凝聚;催化氧化;印染废水;
Keywords chemical equilibrium flows;CFD;EBU combustion model; 化学平衡流;计算流体力学;EBU燃烧模型;
Keywords chemical potential;mole;Jacobi determinant; 化学势;摩尔;雅可比行列式;
Keywords Chemical ceramics Armoring tower Preproduction; 化工陶瓷;铠装塔;试制;