pH Buffer Solution

pH buffer solution

pH buffer solution
pH6.86; pH4.01; pH9.18;
How to prepare the buffer solution:
Solid material for pH4.01, pH6.86, pH9.18 buffer solution are provided in a set of sachets.
Glass jars or beakers are recommended as the solution containers.
Take making the 250ml buffer solution of pH6.86 as an example:
1. Put the pH6.86 buffer solution(in the green sachet) in a jar (the volume should be no less than 250ml)
2. Fill the far with 250ml distill water.
3. Place a glass stick in the solution, swirling it until the white powder dissolved.
4. Store the pH buffer solution in a dry place with the temp. Of 20-25oC. Attach a label on it for further use.
5. For the further calibration, Ensure that there is a contant supply of fresh buffer solution in contact with the probe. Discard the solution after use.