1 M Potassium phosphate buffer
To make 100 mL of 1M potassium phosphate:
pH | mL 1M K2HPO4 | mL 1M KH2PO4 |
---|---|---|
5.8 | 8.5 | 91.5 |
6.0 | 13.2 | 86.8 |
6.2 | 19.2 | 80.8 |
6.4 | 27.8 | 72.2 |
6.6 | 38.1 | 61.9 |
6.8 | 49.7 | 50.3 |
7.0 | 61.5 | 38.5 |
7.2 | 71.7 | 28.3 |
7.4 | 80.2 | 19.8 |
7.6 | 86.6 | 13.4 |
7.8 | 90.8 | 9.2 |
8.0 | 94.0 | 6.0 |
from http://ivaan.com/protocols/151.html
Check the pH with the meter.
Add more K2 to raise the pH, or K1 to lower it.
Dilute as necessary to achieve the desired concentration.
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