These buffer powders (and your distilled water) will make 8½ ounces (250 ml) each of pH buffer solution.
Packs are included for 4.0 pH, 6.8 pH, and 9.18 pH
Directions for use:
1. Completely empty the powder into a clean 12 ounce or larger container
2. Add 250mL (8½ fluid ounces) of distilled water to the container
3. Stir until the powder has completely dissolved.
pH solution is accurate to (-+) 0.01pH
Note: Although the packs says to use deionized water, we find that readily available distilled water is adequate. Distilled water is commonly sold at grocery stores.
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