Permanganate index is one of the indicators in drinking water, when is the high permanganate index? Permanganate index is a commonly used index to reflect the pollution of organic and inorganic oxidizable substances in water, which is defined as: under certain conditions, potassium permanganate is used to oxidize some organic and inorganic reducing substances in water samples, and the equivalent oxygen is calculated from the amount of potassium permanganate consumed.
The potassium permanganate index cannot be used as an indicator of theoretical oxygen demand or total organic matter content, because under specified conditions, many organic matter can only be partially oxidized, and volatile organic matter is not included in the measured value.
How to Test the High Bate Index in Drinking Water?
The use of water quality monitoring instrument to detect the high manganate index in drinking water, the CODMn-8000 permanganate index online analyzer produced by Moody Technology can detect the permanganate index in drinking water!
Detection Method: potassium high bornate colorimetric method
How It Works: After the sample is filtered, it is sent to the digestion tank. At the same time, the analyzer controls the heating device for heating. Potassium melanoate is added to the digestion tank in sequence, and the concentrated sulfuric acid is digested at 100℃. The digestion time can be selected according to the raw water quality. After detecting the absorbance to convert the high Bate index concentration of the water to be measured, the system will automatically clean the entire detection system with pure water to ensure accurate detection next time.
What Do You Need to Pay Attention to During the Detection of High Bate Index in Drinking Water By Online Analyzer?
· Strengthen the control of K value;
· To reasonably determine the amount of sampling;
· Pay attention to the control of heating time;
· Control of solution concentration;
· Control the titration process;
Other Precautions: In order to avoid the occurrence of low test results due to incomplete reaction, the water amount in the water bath should be higher than the water sample in the water sample bottle, so that the heating reaction of the water sample can be more adequate. It should be noted that the water in the pot should not be added too much, so as not to affect the temperature in the pot. Under normal circumstances, a water sample can be placed right at a certain interval, so that the titration operation can be completed in sufficient time. In addition, when the water sample is heated in the water bath, it is best to carry out under the conditions of capping, which can improve the temperature of the water sample in the bottle, the higher the temperature of the water sample, the more adequate the reaction and the better the oxidation degree. At the same time, capping can also effectively prevent the evaporation loss of some tested components in the process of heating, which is conducive to ensuring the readiness of the test results.
