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COD determination by interpolation of the  TOC coefficient method

LIU Yun，QIU Xiao-guo   

  1. Shandong Provincial Environmental Monitoring Centre,Jinan 250013,China
  • Received:2007-05-10 Revised:1900-01-01 Online:2007-08-24 Published:2007-08-24
  • Contact: LIU Yun

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Abstract: The interference in TOC determination of wastewater was basically solved  by use of the conception of normalization method in sample treatment, such as suspended solids, coexistence ions (sulfate, nitrate, phosphate, chloride, sulfur, etc.), high levels of inorganic carbon (IC), high alkali and highsalt. The determination of TOC in wastewater is normalized. Also  the correlation between TOC and CODCr in  water in Shandong Province was studied. For example, the wastewater of paper making, breweries, dyeing, pesticides, pharmaceuticals, starch, MSG, rubber, chemicals, coke, power plant, sewage treatment plant and surface water, and drinking water. It  proves that TOC has a very good correlation with CODCr under the condition of normalization and restricted determination zone. It  also founds  a new method of COD determination by interpolation of the TOC coefficient method.

Key words: coefficient method, TOC, CODCr, correlation, determination

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