P.S. I was just doing some more reading and found that conductivity measurement and ionic measurement are one and the same 'cause ionic refers to the positive charge. Ok. Now I got that.
But since particles are only 5 to 15% of the total, wouldn't you have to divide the total to get particles present in the solution. (that is, after multiplying ppm total by 2.5 to accommodate for the salt calibration of the meter). So a 10PPM multiplied by 2.5 equals 25PPM. Then 5% of that would be 5PPM of particle content. Or am I missing something?