Acid‐base titration of barley roots

Abstract

H saturated barley roots were titrated in the presence of 3 different concentrations of KC1. From the observation of the curves obtained, four regions corresponding to ionogenic groups of different pK values are apparent. A CEC of 20 to 30 miliequivalents/100 g dry weight was calculated for barley roots. A pzc value of about 4.5 was found graphically for the root surface.

Key words:

• Acid‐base titration
• Root surface
• Cation exchange capacity (CEC)
• Point of zero charge (pzc)
• Barley