mg/kg to ppm to %

Measurements Conversions, Metric Conversions

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macoolit
  • macoolit

mg/kg to ppm to %

Fri Mar 14, 2008 11:30 am

How to convert 15 mg/kg to ppm.

Help help help.... urgent request!!!!

Thanks
 
Guest
  • Guest

Re: mg/kg to ppm to %

Fri Mar 14, 2008 7:02 pm

macoolit wrote:How to convert 15 mg/kg to ppm.

Help help help.... urgent request!!!!

Thanks


There are 1 million mg in 1 kg, so 15 mg/kg IS 15 ppm (by weight).

Note that ppm is a vague, poorly defined term. It can express a ratio by weight, volume, or mole fraction. Which "flavor" of ppm is meant should ALWAYS be specified. If you meant ppm by volume or mole fraction, there is not enough info.

In fact, both NIST (SP811) and ISO publications deprecate ppm in favor of terms that clearly specify the units such as mg/kg, µL/L, or µmol/mol. There is NO ambiguity with those.
 
JerryCohen
  • JerryCohen
  • Posts: 1
  • Joined: Fri Dec 10, 2010 12:45 am

Re: mg/kg to ppm

Fri Dec 10, 2010 1:04 am

Convert 3mg/kg to ppm
 
Dirtman
  • Dirtman
  • Posts: 574
  • Joined: Sat Jan 21, 2006 2:04 pm
  • Location: California

Re: mg/kg to ppm

Fri Dec 10, 2010 7:27 am

JerryCohen wrote:Convert 3mg/kg to ppm


3mg/kg = 3 ppm (by weight). Re-read the post by Guest.
 
robertdadeboe
  • robertdadeboe

Re:mg to mg/kg

Mon May 09, 2011 6:26 pm

help me convert milligram to milligram per kilogram

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