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Show ppm = mg/L

  • Thread starter Jimmy25
  • Start date
  • #1
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My text claims that 1 ppm = 1 mg/L. I tried to prove this for myself but I seem to be stuck. This is what I have so far:

1 mg(solute)/L(solvent) = 1 mg(solute) / 1*10^6 mg(solvent)

But:

C(ppm) = (mass solute)/(mass solvent) *10^6 ppm

These seem to be in conflict, what am I not seeing?
 

Answers and Replies

  • #2
Borek
Mentor
28,400
2,800
1 ppm = 1 mg/L for water solutions, when you can assume mass of 1L to be close to 1 kg.
 
  • #3
72
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Yes, but how can it be proved?
 
  • #4
Borek
Mentor
28,400
2,800
1 mg/1 kg = 10-6, I am not sure where the problem is.
 

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