Sensors for pH Measurement in the Laboratory and in Industrial Processes

pH Buffer

Process Analytical & Laboratory pH Buffer for Calibration

A pH buffer is a reference solution of known pH value. These buffers are used for sensor calibration, an essential step in achieving accurate pH measurement results. METTLER TOLEDO offers a broad portfolio of pH buffer bottles for in-line industrial processes and laboratory applications. Single-use sachets are also available to minimize contamination risk in the lab. Whether you need a technical buffer for regular calibration or a high-precision certified calibration standard, we have a suitable pH buffer that meets all your application requirements.

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FAQs

What is a pH buffer?

A pH buffer is a aqueous reference solution of known pH value.

How does a buffer resist changes in pH?

A pH buffer contains a weak acid and conjugate base, or the other way around, in a certain concentration. This constitutes the buffer system. Any addition of a small amount of even a strong  acid or base will have minimal influence on the pH value of the buffer.

How many pH buffers should I use?

The buffers used for calibration must be selected according to the pH of the sample or process.
For instance, if a sample is expected to have a pH of 7.45 or the process to have a pH range of 6.9 to 8.4 the calibration should include pH buffers 7.00 and 9.21 (or similar).
|Use a minimum of two fresh buffers for calibration in the lab and do a two-point calibration in a process environment.

Why are pH buffers important?

pH Buffers are essential for the adjustment and calibration of a pH sensor to ensure accurate measurement.

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