Hello! I am working on using conductivity for measuring residue swabbed off of surfaces. I would like to convert the conductivity to ppm (parts per million). I have found different conversion formulas. What is the best one to use in pharmaceutical solutions? I’ve seen PPM 640, 500, 700; I don’t know which one to use. I’ve also found a formula: ppm = conductivity (microS) divided by 1.56. Can anyone help me out?
Thank you!
Generally when you got TDS in ppm then it’s empirical convert PPM to us/cm in conductivity than just ppm multiplication with 1.65 than you got in us/cm.
1 Like