Occasionally (about once a month), the probe may be cleaned using pH-electrode cleaning solution; generally a 0.1 M solution of hydrochloric acid (HCl) is used,[2] having a pH of one. Alternatively a dilute solution of ammonium fluoride (NH4F) can be used. To avoid unexpected problems, the best practice is however to always refer to the electrode manufacturer recommendations or to a classical textbook of analytical chemistry. Miguel Angel Quevedo see this :) - en.wikipedia.org/wiki/PH_meter
Posted on: Mon, 20 Oct 2014 01:35:20 +0000
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