Metrohm, 6.230.7220, Buffer solution pH 9.00 (30 x 30 mL)

Metrohm pH 9.00 buffer solution supplies a ready-to-use, colorless calibration standard with the stated pH value at 25 °C. The package contains thirty individually portioned 30 mL single-use sachets, enabling laboratories to open a fresh volume for each calibration session instead of repeatedly dipping electrodes into a large stock bottle. This packaging helps limit carryover, evaporative changes and contamination during routine electrochemical measurements. The alkaline-range buffer is appropriate for alkaline-range electrode calibration for samples whose measurement range extends above neutral pH, including water-treatment and process-control solutions. It supports compatible pH measurement systems and multibuffer calibration procedures when used with other reference points. Temperature matters when assigning pH values; this label refers specifically to 25 °C, not to an invariant value at all temperatures.