Calculating PPM - (Dec/11/2012 )
chandch on Tue Dec 11 20:12:44 2012 said:
For example, so my liquid is 0.897 g/cm3 is 0.897 g/ml. So I need 100 ppm. If I take 1.02 ml and put in 998.98 ml solvent which is 100 ppm. Am I right? or If I take 0.51 ml and 499.49 ml solvent, so it is 100 ppm. am I right?
If you take 1,02ml, you have= 1,02ml x 0,897 g/ml = 0,914 grams (its a bit less then 1, you need to recalculate it.. (I rounded the numbers))
I just noticed a mistake, you need 1 mgrams not 1gram!
So 1 gram is 1000 ppm more then 1mg.
So if you take 1 gram (1,02ml) and add this in 998,98ml , totaling 1 gram in 1000ml or 1gram in 1 liter, you have 1000ppm = 1000g/m
So to have 1000pm, you dont need 1 gram, but 0,1 gram.
I hope there are not mistakes this time.
But its pretty simple in the end:
1 ppm means 1 part per million, and you know that 1 ppm = 1g/m
So you should be able to figure it out yourself now.
-pito-
Thank you.
-chandch-
chandch on Wed Dec 12 08:31:47 2012 said:
Thank you.
Just make sure you understand the logic behind it.
There is no point in memorising formulas.
An re-calculate it, its possible I might an error somewhere.
-pito-
1mg/106 mg (PPM)
Does density of solutions needs consideration? some solutions have less volume/kg other higher.
-Inbox-
prabhubct on Wed Dec 12 19:08:30 2012 said:
1mg/106 mg (PPM)
Does density of solutions needs consideration? some solutions have less volume/kg other higher.
Yes it matters.
If you work with a solution and not a powder for example, it matters.
Its the "substance/powder" that matters, not the fluid in wich it is dissolved.
-pito-