Sensor - The Electronic Nose Artificial Olfaction Technology - page 58

Fig. 2.16 pH Electrode

features for pH measurement; auto-buffer recognition, calculated slope and %
efficiency, log tables for concentration of ions and more.
Buffers: These solutions of known pH value allow the user to adjust the system
to read accurate measurements. For best accuracy:
• Standardization should be performed with fresh buffer solutions.
• Buffer used should frame the range of pH for the samples being tested.
• Buffers should be at the same temperature as the samples (For example: if all
your samples are at 50 C, warm your buffers to 50 C using a beaker in a warm
bath.). Buffer values are dependent upon temperature. In Fig. 2.17 displays the
pH scale group with various types of examples, i.e., Milk pH is near to between
6 and 7pH.

Application of pH measurement:

• Jam and jelly manufacturing
• Laundries
• Meat and Fish Processing
• Pharmaceuticals
• Printing
• Sewage
• Swimming pool
• Dyeing
• Electrical equipment