Prior to use, the
sample solution was diluted with the electrophoresis
medium (0.1 mol/l NaOH) to the required concentration.
NaOH (0.1 mol/l) solution was used as the electrophoresis medium. In this alkaline solution, copper working electrode shows excellent response to carbonhydrates
including lactose (Colon, Dadoo & Zare, 1993).