pH Buffer Solutions, Hanna

Hanna’s solutions are made from established formulas and are standardized with a pH meter that is calibrated to the NIST primary standard solutions. The 20 ml pouches are ideal for infrequent calibrations or use in the field. The pouches are sealed to protect against entry of light or air. The pouches also have a temperature reference table. Accuracy is ±0.01 pH at 25°C.