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 Testing                                                                                                                                                           SURFACE pH

   

 

Surface pH

 

       

Apparatus

The following apparatus is required.

pH Meter - any standard pH meter with glass electrode and a single combination electrode calibrated against standard buffer solutions at two pH values.

 

Reagents

The following reagents are required.

Buffer Solutions - Two standard solutions, one with pH 4 and the other with pH9.

Distilled Water - pH 6. 0 to 7. 2 and carbon dioxide free.

 

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