Polyaluminum chloride (PAC) Determination of relative density

The method for determining the relative density of polyaluminum chloride (PAC) is as follows:

1. Take a certain quality polyaluminum chloride sample, put it into a drying bottle of known volume, and record the weight of the drying bottle;

2. Use dry phenol standard solution to inject the solution from the top of the drying bottle to completely discharge the air bubbles in the drying bottle;

3. Put the drying bottle into a Water Bath with a temperature of 20°C, keep it for 30 minutes, and then wipe off the moisture outside the drying bottle with a rag;

4. Weigh with a balance, and record the total weight of the drying bottle plus the solution;

5. Calculate the density of the solution according to the density and temperature of the phenol standard solution used;

6. According to the volume of the drying bottle, the relative density of polyaluminum chloride can be calculated by subtracting the air density from the density.

Beichao reminds you: this method is only suitable for determining the relative density of PAC solid samples, but for the determination of liquid PAC samples, other methods are required.