Standardized and certified traceable to NIST Standard Color-coded for quick reference Accuracy ±0.01 pH at 25°C pH temperature chart, lot numbers and expiration dates on each label pH 4.0 buffer is colored red, 7.0 buffer is yellow or green and 10.0 buffer is blue.…

Ricca’s VeriSpec® pH Buffer and Conductivity Standard Certified Reference Materials are ISO 17025/17034 accredited to provide the highest level of quality assurance. These products have undergone rigorous evaluations of manufacturing methods, quality control, stability, and homogeneity.…