The solid content is measured according to GB/T 1725. After drying the clean watch glass, weigh the mass m 0 , accurately weigh about 1g of the sample in the watch glass, the total mass m 1 , and place it in an oven at 150±2°C After drying within 2 hours, the total mass is m 2 , and 3 parallel experiments are carried out at the same time to ensure that the error before and after does not exceed 0.01g.
The solid content calculation formula is as follows:
