I have this question at work from one of the engineers, but don't so much have the time to look it up in a reference book. But here is the deal, someone is taking my Cl content in mg/L using the resistivity of the fluid that I tested and telling me that the PPM is EXTREMELY high.
I don't get it, none of the engineers at work are understanding where this other individual is calculating Cl in PPM.
Thank you to all the Eng. or Chemists that can help.
Answer:
I assume ppm in this context means parts per million by mass; that is, the number of micrograms of Cl per gram of solution.
The conversion from mg/L to ppm is:
(concentration in ppm) = (concentration in mg/L)/(solution density in kg/L)
For dilute aqueous solutions at around room temperature, the density of the solution will be ~1kg/liter, so in this case:
concentration in ppm ~= concentration in mg/L
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