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#1




mg/L to ppm
I am trying to convert a test result that is provided as mg/L to ppm. The specification requirement is 600 ppm (parts per million) and my test result is shown as 711 mg/L. If remember correctly the conversion is equivalent but I am not sure.

#2




Re: mg/L to ppm
Many resources you find show mg/L the same as ppm, but its not exactly true.
Pure water at standard temperature and pressure has a density of 1 kg/L, therefore: mg/L = mg/kg = ppm But that is only true when using pure water at standard temperature and pressure. Any other substance will have a different density and will not be a direct conversion between mg/L and ppm. 
#3




Re: mg/L to ppm
Hi, for a solidsolid system, the conversion for ppm is mg/kg. For a solidliquid system, the conversion is mg/L. For a gasgas system, the conversion is uL/L.
In a solidliquid system you can calculate proportions easily, using dilution factors etc. As the liquid is effectively just a carrier, the density of the liquid is not usually important. In your system, 711mg/L is 711ppm, if it was measured at room temperature, or at some other specified temperature of interest. 
#4




Re: mg/L to ppm
i have a small conversion to make can you help to sort it out.
i am adding 80 grams of color in one litre water and out of this i am using 50 ml to 40 kg mass i am adding 60 grams of color in 600 ml of water and out of this i aming using 4 ml to 40 kg same mass mentioned above. can you calculate and tell the total ppm of color in this 40 kg mass 
#5




Re: mg/L to ppm
Quote:
For your first one, you are taking 50mL/1000mL x 80g. = weight A. Weight A x1000 = mg of weight A. this weight A (in mg) is going in to 40kg. Now work out how many mg of A is in each kg. That is your answer. (mg/kg = ppm) Have a go at the second one yourself. You are welcome to post back here if you would like your answers checked. Good luck with your studies. 
#6




Re: mg/L to ppm
Hai there im sorry but i am confused with your reply please see if i got it right
I take 20 ml from a solution of 2.19g/100 ml so inorder to convert it to ppm 0r mg/kg it would be 20ml/(100ml*2.19gm) = 91.324 mg please do help me out as i cant find the answers to this any were else ! 
#7




Re: mg/L to ppm
Quote:
In 100mL you have 2.19g, in 20mL you have 20/100 of that. 2.19g x (20/100) = 0.438g, or 438mg These are proportion calculations, so always work out what proportion you are taking.  In this case a fifth. Hope this helps, and good luck with your studies. 
#8




Re: mg/L to ppm
Honestly thank you very much i get it finally!

#9




Re: mg/L to ppm
Okay i am sorry to bother you again its jut my supervisor is on a holiday
If i took .005 litres (5 mL) from a standard solution of 21900mg/1litre Here 21900mg/1litre = 21900 ppm but if i take out .005 ml from this i have 109.5 mg in it is 109.5mg/.005ml also = 109.5 ppm? I would really appreciate it , thank you! 
#10




Re: mg/L to ppm
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