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Juchuang 101W COD microwave digestion instrument
The wave-sealed digestion COD measurement device uses electromagnetic wave (referred to as microwave) energy at a frequency of 2450MHZ to heat the reaction liquid. Under the action of high-frequency microwave energy, the reaction liquid molecules produce high-speed frictional movement, causing its temperature to rise rapidly. The sealed digestion method is used to rapidly increase the internal pressure of the digestion tank to about 203kPa. Therefore, not only the digestion time is shortened, but also the chloride ion is inhibited from being oxidized by potassium dichromate to chlorine gas. If an appropriate amount of mercury sulfate is added as a masking agent, COD measurement of high chlorine water can be achieved. The entire digestion process is free of cooling water, reducing the trouble of installing cold water pipes and stopping water. Water sample is under the control of microcomputer, in a strong acid solution, a certain amount of potassium dichromate is used to oxidize the reducing substances in the water sample. Perform titration and calculate the COD Cr value. The colorimetric method can also be used to directly measure the concentration of trivalent chromium in the reaction solution at a wavelength of 600 nm to obtain the COD Cr value of the water sample. ? Seal digestion, overpressure protection, safe and reliable, and beep prompt when digestion is completed.