Fluor Atomic weight 18.99 g/mol
0.00025 g Fluor
= 0.00001316482359 mol
Now multiply times Avogadro
and you get
= 7928042389910619000
molecules of Fluor
Then you need a volume e.g. 100 ml of H20 which would correspond to 3.34563E+24 molecules (1E+24 = 1x10^24)
Than you calculate the ration of Molecules Fluor per Molecules water which is this case
0.00000236966825
or
2.369 E-6
ppm is E-6 ratio!
therefor 0.25 mg F correspond to 2.369 ppm F in 100 ml of H2O
| Current Thread... | |
| 11/29/2012, 5:30 PM | ppm |
| 11/29/2012, 6:41 PM | Re: ppm |
| 11/30/2012, 5:33 PM | Re: Re: ppm |