The conductivity of a solution depends on the numner of positive and negative 
ions (cations and anoins) that the solution contains and their relative 
electricl strenght. It is also temperture dependent. The PPM referes to the 
parts per million of any ONE soluble molecule. It is a measure of 
concentration, while the conductivity is an electrical measurement. They are 
not related in any way, except that if you have a solution of a single known 
ion, the conductivity can be calculated.
regards
FCR