https://bridgeslab.sph.umich.edu/protocols/index.php?action=history&feed=atom&title=Using_the_pH_MeterUsing the pH Meter - Revision history2026-05-10T18:19:31ZRevision history for this page on the wikiMediaWiki 1.45.1https://bridgeslab.sph.umich.edu/protocols/index.php?title=Using_the_pH_Meter&diff=1362&oldid=prevDavebrid: wrote initial page2017-08-02T14:27:26Z<p>wrote initial page</p>
<p><b>New page</b></p><div>This is for the Mettler Toledo FiveEasy Plus meter<br />
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==Calibration==<br />
* Open up the hole on the top of the probe<br />
* Rinse the meter with water<br />
* Place in pH 4.00 standard and press '''Cal''', once the pH has stabilized press '''Read'''.<br />
* Repeat with pH 7.00 and pH 10.00 standards.<br />
* When complete press '''Read''' again<br />
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==Measuring pH==<br />
* Place meter in sample with stirring, make sure the stir bar is not hitting the probe.<br />
* Press '''Read''' to start measuring the sample.<br />
* Adjust pH with NaOH/KOH or HCl depending on the counter-ion. If you are using a very weakly buffered solution, use diluted acids/base. If adjusting pH of a buffer stock you may need to use the concentrated acid or pellets.<br />
* When finished rinse off the probe, close the hole on the top and place in the storage solution (3M KCl)<br />
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[[Category: Chemicals]]<br />
[[Category: General]]<br />
[[Category: Media]]<br />
[[Category: Buffer]]</div>Davebrid