pH Buffers and Solutions

Explore a range of pH buffer solutions designed for the calibration, verification and routine performance checking of laboratory pH meters and pH electrodes.

pH buffer solutions are prepared to provide known and stable pH values, allowing pH measurement systems to be calibrated before sample analysis. Different buffer values are available to support calibration across different measurement ranges and applications.

Common laboratory pH buffer solutions include pH 4.00, pH 7.00 and pH 10.00 buffers, with other standard values available depending on the measurement requirements and instrument specifications. Single-point, two-point or multi-point calibration can be performed using appropriate buffer solutions according to the pH meter and electrode manufacturer's recommendations.

pH buffers are commonly used for laboratory analysis, water quality testing, chemical testing, food and beverage analysis, pharmaceutical applications, environmental testing, research and quality control. They are suitable for calibrating benchtop and portable pH meters as well as compatible pH electrodes.

When selecting a pH buffer solution, consider the required pH value, accuracy or tolerance, traceability requirements, packaging volume, shelf life, storage conditions and compatibility with the pH measurement system.

For reliable pH measurement, buffer solutions should be handled and stored according to the manufacturer's instructions, and fresh or uncontaminated solution should be used for calibration where required.