化学需氧量（codcr）水质在线自动监测仪是集机械、光电、自动控制和化 学为一体的高科技产品，能够自动长期无人值守地监测水体的COD指标。 2.2监测仪特点

1.1 This method covers the determination of chemical oxygen demand (COD) in ground and surface waters, domestic and industrial wastes. 1.2 The applicable range is 3-900 mg/L.

晶体学开放数据库（Crystallography Open Databa，COD），COD储存晶体学数据、原子坐标参数以及详细的化学内容和参考文献的、以计算机控制管理的数据库。 它对所收集的大量分子结构数据进行了全面的、广泛的整理、…

All data in the COD and the database itself are dedicated to the public domain and licensed under the CC0 License. Users of the data should acknowledge the original authors of the structural data.

COD Chemical Oxygen Demand . INSTRUMENTATION: Titration . STORET No. 00340 . 1.0 Scope and Application 1.1 When the chloride level exceeds 1000 mg/L the minimum accepted value for the COD will be 250 mg/L. COD levels which fall below this value are highly questionable because of the high chloride correction which must be made.

2017年8月31日 · Chemical oxygen demand (COD) is a critical analytical parameter for water quality assessment. COD represents the degree of organic pollution in water bodies. However, the...

The chemical oxygen demand (COD) test is commonly used to indirectly measure the amount of organic compounds in water. Most applications of COD determine the amount of organic pollutants found in surface water (e.g. lakes and rivers), making COD a useful measure of water quality. It is expressed in

March 2023: Malvern Panalytical publishes a new release of their free, COD-derived search-match database. The new COD database file is meant to be used with all versions 4.x and 5.x of the PANalytical HighScore (Plus) software packages. It can be downloaded as one (6.9 GB) database file in .HSRDB format from the archive and is ready for use.

5220 CHEMICAL OXYGEN DEMAND (COD)* 5220 A. Introduction Chemical oxygen demand (COD) is defined as the amount of a specified oxidant that reacts with the sample under controlled con-ditions. The quantity of oxidant consumed is expressed in terms of its oxygen equivalence. Because of its unique chemical properties, the dichromate ion (Cr2O7

COD is the measurement of the amount of oxygen in water consumed for chemical oxidation of pollutants. COD determines the quantity of oxygen required to oxidize the organic matter in water or waste water sample, under specific conditions of oxidizing agent, temperature, and time.