cod rapid digestion instrument is a new product instrumented 1 an experimental method, which has the advantages of small size, water saving, electricity saving, simple operation and good constant temperature performance. COD, total phosphorus, total nitrogen and other samples can be digested and pretreated, and the constant temperature timing time can be automatically completed. The time is set for 1-999 minutes. After the constant temperature time arrives, the instrument has automatic sound alarm function and automatically shuts down without manual participation. But because it is the 1 new product, many friends don't know how it works. Then you know cod rapid digestion How does it work? The following is a brief introduction by yi yun Tian:

cod rapid digestion instrument working principle:

chemical oxygen demand (COD or CODcr) refers to the amount of oxidant consumed when reducing substances in water are oxidized and decomposed under the action of an external strong oxidant under certain strict conditions, expressed in mg/L of oxygen. Chemical oxygen demand reflects the degree of water pollution by reducing substances, these substances include organic matter, nitrite, ferrous salt, sulfide and so on.

Generally, the amount of inorganic reducing substances in water and wastewater is relatively small, and organic pollution is very common. Therefore, COD can be used as a comprehensive index of the relative content of organic substances. + COD analyzer (chemical oxygen demand meter) uses sealed digestion method to digest the sample, and uses advanced cold light source, narrow band interference technology and microcomputer to automatically process the data to directly display the COD(mg/L) value of the sample.

Under certain conditions, the amount of potassium dichromate consumed by the water sample is converted into the corresponding mass concentration of oxygen, which is the apparent CODcr. The mass concentration of oxygen corresponding to the chlorine generated by the oxidized chloride ions in the water sample is the chloride ion correction value. The difference between the apparent CODcr and the chloride correction value is the CODcr of the measured water sample. Therefore, cod rapid digestion instrument is mainly used for COD sample digestion in high chlorine water (water and wastewater, chloride ion concentration is greater than 1000mg/L).It is especially suitable for the digestion of CODcr in water and wastewater with chloride ion concentration greater than 1000mg/L, less than 50000mg/L and CODcr greater than 10mg/L.

In summary, it is the working principle of the cod rapid digestion instrument. Because of this, cod rapid digestion instrument is very suitable for environmental protection, medical, health, food, tap water, papermaking, sewage treatment, printing and dyeing, petrochemical, metallurgy, colleges and universities and other industries of water quality monitoring, rapid determination of chemical oxygen consumption heating device.