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pH test
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07-08-2010, 10:40 PM #1
eaadams Concrete Moisture Expert *****
Status: Offline Posts:591 Threads:85 Joined:Jul 2010
I notice that wagner sells pH test with distilled water. I thought it was important to use deionized water? As distilled can still carry a charge that can throw off a pH test.

07-09-2010, 09:33 AM #2
EWagner Administrator *******
Status: Offline Posts:50 Threads:19 Joined:Jul 2008
From ASTM F710:
5.3.1 To test for pH at the surface of a concrete slab, use wide range pH paper, its associated pH chart, and distilled or deionized water. Place several drops of water on a clean surface of concrete, forming a puddle approximately 1 in. (25 mm) in diameter.

From Wagner:
Both de-ionization and distillation processes remove ions from the water and produce "pure water". De-ionization processes can leave bacteria in water. Distillation leaves pure water. In terms of quality, distilled water is better. The standard calls for using either.

Hope this helps you, eaadams.
-admin

07-09-2010, 09:45 AM #3
eaadams Concrete Moisture Expert *****
Status: Offline Posts:591 Threads:85 Joined:Jul 2010
thank you!








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