Liquid Chromatography Detectors - The Electrical Conductivity Detector > Page 84

The specific resistance of a conductor is the resistance across two opposite faces of a 1 cm cube made of the conductor material. The specific conductance (k) of a solute is the reciprocal of the specific resistance, i.e.,

                                                                                  

Thus the conductance of a given solution (C) is given by,

                                                                                           

The conduction of all the ions produced by 1 g equivalent of an electrolyte at any particular concentration can be evaluated by imagining two large parallel electrodes, 1 cm apart, and the whole of the solution placed between them. The conductivity of the system is called the equivalent conductance (L).

 

If 1 g equivalent of the electrolyte is dissolved in (v) ml of solution; then it follows that this will cover (v) cm2 of electrode area. It follows that in the above equation (a) becomes (v) and (l) is unity and