缓冲区是一个标准溶液pH值的有限公司ntrolled to be very accurate. There's even a table included on the bottle that shows how you should correct for the present temperature during a pH determination.
We use buffers incalibrationsto check that a pH-meter works correctly, and inadjustmentsto adjust the settings of the pH-meter.
Common buffers we use have the following pH:
But there are many more, and the exact value can always be found on the bottle.