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Research on the Rapid Determination of COD in Wastewater by the UV-spectrometry

Haifeng Chen

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Abstract

On the basis of potassium dichromate method,the determination of COD in wastewaters was investigated by the ways of increasing the relative amount of the catalysts and the oxidants which shortened time greatly.The spectrometry was used to replace the titration with ammonium ferrous sulfate and the maximum absorptiom wavelength was 349 nm.The results showed that the method met determination requirements which water COD ranged 10~700 mg·L-1.The relative standard deviation was less than 2.6%,and showed good precision and accuracy.

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What this paper is about

On the basis of potassium dichromate method,the determination of COD in wastewaters was investigated by the ways of increasing the relative amount of the catalysts and the oxidants which shortened time greatly.The spectrometry was used to replace the titration with ammonium ferrous sulfate and the maximum absorptiom wavelength was 349 nm.The results showed that the method met determination requirements which water COD ranged 10~700 mg·L-1.The relative standard deviation was less than 2.6%,and showed good precision and accuracy.

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Available abstract

On the basis of potassium dichromate method,the determination of COD in wastewaters was investigated by the ways of increasing the relative amount of the catalysts and the oxidants which shortened time greatly.The spectrometry was used to replace the titration with ammonium ferrous sulfate and the maximum absorptiom wavelength was 349 nm.The results showed that the method met determination requirements which water COD ranged 10~700 mg·L-1.The relative standard deviation was less than 2.6%,and showed good precision and accuracy.

Key concepts: Potassium dichromate, Relative standard deviation, Wastewater, Titration, Chemistry, Ferrous, Ammonium sulfate, Ammonium

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