Re: Re: ppm   (11/30/2012, 5:33 PM)

If I have tablet containing 0,5528mg NaF, how do I get ppm?

 


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11/29/2012, 5:30 PM ppm
11/29/2012, 6:41 PM     Re: ppm
11/30/2012, 5:33 PM         Re: Re: ppm