Determination of parameters of self-swimming bath
In order to ensure the quality of self-coating, the main technical parameters of the bath should be tested regularly, and the parameters of the bath should be adjusted in time according to the test results.
Determination of bath solid content
(1) Instruments and materials
Analytical balance (sensitivity 0.001g); constant temperature Forced Air Drying Oven; glass desiccator (containing color-changing silica gel); porcelain crucible or petri dish.
(2) Operation steps
① Bake the clean petri dish in a constant temperature Forced Air Drying Oven at (105±2)°C for 30 minutes, take it out and put it in a glass desiccator, wait for it to cool down to room temperature, and weigh it with a balance (W0) for later use. Stir the self-swimming tank liquid to be tested evenly, transfer 1~2g of the self-swimming liquid into a weighed petri dish, make it evenly cover the bottom of the container, and then put it into a constant temperature Forced Air Drying Oven, first at 100 Bake at ℃ until most of the water is volatilized, then raise the temperature to (160±2)℃ and bake in a constant temperature Forced Air Drying Oven for 1 hour, take out the petri dish and put it in a glass desiccator, wait for it to cool to room temperature and weigh.
③Put the petri dish back into the oven at (160±2)°C and bake for 30 minutes, take it out and put it in a glass desiccator, and weigh it again after it cools down to room temperature (W,).
④ The error of the two weighings should not be greater than 0.0lg, otherwise step ③ should be repeated until the error of the last two weighings is less than 0.01g.
The calculation formula of Cs (solid content) of self-swimming bad liquid:
C s (solid content)=(W 1 -W 0 )/W * 100%
W0-the mass of the petri dish, g;
W, the total mass of the sample and the petri dish once baked to constant weight, g;
W—the mass of liquid transferred into the petri dish from the swimming pool, g.
The test results take the average value of two parallel experiments, and the relative error of the parallel experiments should not be greater than 0.3%.
pH measurement
①Determination of pH test paper This method can be used for a rough test of the pH value of the self-swimming tank.
②Acidity meter measuring instruments and materials: glass beaker, thermometer, distilled water, standard buffer solution, etc. The operation was determined according to the instrument manual.
Conductivity determination
Instruments and materials: glass beaker, thermometer, distilled water, standard buffer solution, etc., and the operation was determined according to the instrument manual.
Redox Potential Determination
①Instruments and materials Millivoltmeter; glass beaker (50~100mL); thermometer (0~50℃); plain distilled water (conductivity≤5X10-4S/m).
② The operation steps are measured according to the instrument manual.
