How to quickly judge the concentration range of COD water samples?

When detecting COD, when we get an unknown water sample, how to quickly understand the approximate concentration range of the water sample? Taking the practical application of Lianhua Technology’s Water Quality testing instruments and reagents, knowing the approximate COD concentration of the water sample can help us choose the appropriate range and COD reagents to make the detection value more accurate, thus providing more information for the subsequent sewage treatment work. Real and reliable data support.

Next, we will follow the steps of Lianhua Technology engineers and teach you how to quickly understand the approximate concentration of COD in water samples. First, take 3 test tubes and place them on the test tube rack, add 2.5 mL of distilled water to one of the test tubes, and add 2.5 mL of the water sample to be tested to the other two test tubes. Then add the DE reagent of Lianhua Technology COD to the three test tubes in turn, shake well and observe the color change of the water sample in the test tubes. We use the color to judge the approximate concentration of COD in the water sample. The closer the color is to blue-green, the greater the concentration, and vice versa, the closer the color is to blank, the smaller the concentration. According to this principle, other detection items can also know the approximate concentration of the water sample through the final color development of the experiment. Have you learned it?

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