#WishIknew – What’s a pH calibration buffer solution?


When you have a question about process automation that needs a short answer, let us know with #WishIknew and @Visaya! We’ll reply with a #WishIknew post. It’ll give a quick explanation, then some related articles, videos, or reviews if you want to know more.

I wish I knew what a pH calibration buffer solution is!

And well you should, if you work with pH. You must know this detail if you want to get anywhere in the pH world.

When we talk about buffer solutions, we usually mean liquids which don’t vary much in pH value when you add acids or bases to them. To achieve this stability, a buffer solution itself must have a balanced mix of acid and base. This graphic will show you how to produce a buffer solution.

Courtesy of SlideShare

Now a pH calibration buffer solution must have an accuracy of +/-0.01 at 25 degrees Celsius. Usually, buffer solutions range in pH from 1.68 to 10.1. They must also follow ISO standards and NIST traceability policy.

Last but not least, buffer solutions can have different colors to identify their pH values. Blue indicates a basic solution, red acidic, and yellow neutral. Hope you learned something today!

Related tags: #WishIknew Analytics Basic Buffer solution Calibration devices English pH ph measurement Principle
#WishIknew - What's a pH calibration buffer solution?
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