Uncertainty of a pH measurement

by Lynn

The uncertainty of a pH measurement strongly depends on measurement procedure and on the pH value itself.

The uncertainty is the lowest near the isopotential point and in the center of the calibration line and can increase by a factor of 2 when moving from around pH 7 to around pH 2 or 11.

Comments for Uncertainty of a pH measurement

Average Rating starstarstarstarstar

Click here to add your own comments

May 29, 2010
Junction potential
by: Joe

A major contributor to the uncertainty in pH measurement arises from the reference
potential of the Ag/AgCl reference electrode.

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to pH Test accuracy tips and advice.

Alibris: Books, Music, & Movies

SuppliesShops.com - Click Here for ALL Your Office Supply Needs!

Favorite pages:

acids and bases
What is an acid? What is a base? If you want to know, read here!

calculating ph
Do you know what pH stand for? If not, click here!

electrode design
The pH electrode consists of the following parts:
. . read here!
offset error
Real-world pH electrodes are not ideal,
read why.

definition of ph
What is the definition of pH? See the answer. . .

nonglass ph electrode
Is it not possible to use a glass electrode for your application? Use a non-glass pH electrode.

ph measurement
Learn how the temperature affects your pH measurement.

Download the new release ISO 14001:2015