With the continuous progress of society, we pay more and more attention to water quality safety issues! Among them, permanganate index is one of the indexes that comprehensively reflect the pollution degree of organic matter and inorganic reducing matter. It is a key monitoring project of surface water and drinking water quality, and an important index for evaluating water quality. So what impact will heating bring to permanganate index water quality monitoring? This chapter water quality online monitoring instrument manufacturers to understand together with you!
Effect of Heating Time
The permanganate index measures the amount of reducing substances in the water sample oxidized by potassium permanganate within a specified time under acidic conditions, and the reaction time affects the final determination result. The amount of potassium permanganate standard solution titration increased and the test result was high. The heating time is too short, the titration amount of potassium permanganate standard solution is reduced, and the test result is low. The boiling water bath into the conical bottle with samples will cause the water temperature to drop, so the heating time can not be measured from the conical bottle into the water bath, but should be measured from the water bath boiling again, and the heating time is controlled at 30min.
Product Working Principle
During the monitoring of drinking water permanganate index by CODMn-8000 online analyzer, the samples are filtered and sent to the digestion tank, and at the same time, the analyzer controls the heating device for heating. Potassium bate is added to the digestion tank in order, and then the concentrated sulfuric acid is digested at 100℃. The digestion time can be selected according to the raw water quality. Optical detection is carried out by measuring the absorbance to convert the high Bate index concentration of the water to be measured. After measurement, the system will automatically clean the entire measurement system with pure water to ensure accurate measurement next time.
