Welcome to OnlineConversion.com Forums

 OnlineConversion Forums mg/L to ppm
 User Name Remember Me? Password
 [ Home ] [ Forum Home ] Register FAQ Calendar Search Today's Posts Mark Forums Read

 Convert and Calculate Post any conversion related questions and discussions here. If you're having trouble converting something, this is where you should post.* Guest Posting is allowed.

 Thread Tools Display Modes
#1
05-18-2006, 03:21 PM
 Unregistered Guest Posts: n/a
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
05-19-2006, 03:07 AM
 Robert Fogt Administrator Join Date: Dec 2005 Location: Seattle, WA Posts: 3,414 Rep Power: 12
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
05-21-2006, 03:21 PM
 Mrs X can't count, can't spell! Join Date: Feb 2006 Location: New Zealand Posts: 2,377 Rep Power: 11
Re: mg/L to ppm

Hi, for a solid-solid system, the conversion for ppm is mg/kg. For a solid-liquid system, the conversion is mg/L. For a gas-gas system, the conversion is uL/L.

In a solid-liquid 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
10-11-2007, 12:15 AM
 Unregistered Guest Posts: n/a
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
10-11-2007, 01:17 PM
 Mrs X can't count, can't spell! Join Date: Feb 2006 Location: New Zealand Posts: 2,377 Rep Power: 11
Re: mg/L to ppm

Quote:
 Originally Posted by Unregistered 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
This sounds like a home work question - I don't give answers for these, but will help you to work it out for yourself.

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
08-26-2009, 11:10 AM
 fuzik Guest Posts: n/a
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
08-26-2009, 06:36 PM
 Mrs X can't count, can't spell! Join Date: Feb 2006 Location: New Zealand Posts: 2,377 Rep Power: 11
Re: mg/L to ppm

Quote:
 Originally Posted by fuzik 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 !
Just making sure i understand what you are asking, you are taking 20mLof a solution, and you want to know what weight of the compound of interest you have?

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
08-31-2009, 06:34 PM
 Unregistered Guest Posts: n/a
Re: mg/L to ppm

Honestly thank you very much i get it finally!
#9
09-01-2009, 05:12 AM
 Unregistered Guest Posts: n/a
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
09-01-2009, 07:05 AM
 JohnS Double Ultimate Supreme Member Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,215 Rep Power: 18
Re: mg/L to ppm

Quote:
 Originally Posted by Unregistered 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!
I believe you took out 0.005 L or 5 mL, not 0.005 mL. In any case the ppm value is a ratio and will NOT change if you take some stock solution (unless you also dilute it). 109.5 mg/0.005 L = 21900 ppm.

 Thread Tools Display Modes Linear Mode

 Posting Rules You may post new threads You may post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Main Forums     Convert and Calculate     Resources     General Chat

All times are GMT -8. The time now is 01:26 PM.

 Contact Us - OnlineConversion.com - Archive - Privacy Statement - Top