pH Meter Buffer Solution for pH 7.01 (20mL Pack)

pH 7.01 Buffer SolutionpH Meter Buffer Solution for pH 7.01 (20mL Pack) A pH meter needs to be calibrated before each use, and this is one of the solutions necessary. Directions: Rinse the electrodes with a small portion of buffer, then standardize in enough fresh buffer to cover the tips of the electrodes. The buffer cannot be reused. Discard after use. California Proposition 65 ⚠ Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.