HYDROGEN ION CONCENTRATION (PH) OF PAPER EXTRACTS (COLD EXTRACTION METHOD)

• This method measures the hydrogen ion concentration of a cold aqueous extract (unfiltered) of paper, expressed in terms of pH value.
• This method consists of a cold water (25 ± 5 ° C) extraction of the specimen for one hour followed by a pH measurement with a commercial pH meter.
• The pH is insensitive to changes of concentration and elaborate precautions to ensure saturation are unnecessary. The temperature of saturation may vary from 22 to 28 ° C.

It Provides information on:

• Reagents
• Calibration
• Sampling
• Test specimen
• Keywords