Standard reference materials and buffer solutions, CertiPUR®, Supelco®
: Merck
Materials for the precise calibration and monitoring of pH instruments.
- Traceable to NIST primary standard and PTB
- Maximum deviation ±0,003 pH units
- Measured in an independent accredited calibration laboratory for the pH value measurement (DKD-K-14301)
- Environmentally Preferable: