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- Posts: 40
- Joined: Thu Oct 27, 2016 6:48 am
Why Standard Solution is 5 ppm?
Limit spec is 200 ppm!
https://ibb.co/f2wBGPZ
Discussions about sample preparation: extraction, cleanup, derivatization, etc.
Hollow wrote:
because it doesn't rely on concentrations but mass of chlorides.
mass of sample in test solution tube: 10 g/100 ml *2.5 ml = 250 mg (of sample)
mass of chloride in standard solution tube: 10 ml * 5 mg [Cl]-/L = 50 µg of Cl-
50 µg/250 mg = 0.200 µg/mg = 200 ppm
etaxene wrote:
okkk thanks.. but.... why 50/250? or why a fraction and not an equivalence?
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