A method and system for determining the content of volatile organic acids
A volatile organic acid and content technology, applied in the direction of chemical analysis by titration, can solve the problems of affecting the measurement, complicated and complicated, and achieve the effects of improving efficiency, accurate measurement results, and fast and real-time measurement process.
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Embodiment 1
[0049] Configure the sample to be tested according to the theoretical concentration of acetic acid (HAc) shown in Table 1 below, then take 50ml of the sample and quickly transfer it to a cylindrical glass titration bottle with a diameter and height of 0.05 meters to become a solution to be titrated. Connect the pH meter into the titration bottle to measure the pH value of the solution in the titration bottle. One end of the pump tube of the peristaltic pump is inserted into the storage bottle filled with 0.01mol / L hydrochloric acid, and the other end is connected to the titration bottle, and pumped into the titration bottle Drop in hydrochloric acid and carry out titration, the rate of addition is 2ml / min. The pH meter transmits the measured pH value to the computer every 5 seconds, and the titration stops when the pH value of the sample is lower than 3.5. Use the calculation module in the computer to match the corresponding time and pH value with the change of the buffer stre...
Embodiment 2
[0054] In a lab-scale set of anaerobic batch reactors, samples were taken every half hour for four hours. The changes of the volatile organic acid content in the reactor were continuously monitored by the five-point titration method and the method of the present application respectively.
[0055] Take 10 milliliters of samples each time, quickly transfer them to a cylindrical glass titration bottle with a diameter and a height of 0.05 meters, add water to dilute to 50 milliliters, and prepare the solution to be titrated. Connect the pH meter to the titration bottle to measure the pH value of the solution in the titration bottle. One end of the pump tube of the peristaltic pump is inserted into the storage bottle filled with 0.01mol / L dilute sulfuric acid, and the other end is connected to the titration bottle to start the titration. Dilute sulfuric acid was added dropwise into the bottle for titration at a rate of 2ml / min. The pH meter transmits the corresponding time and mea...
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