mg/kg to ppm to %

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mg/kg to ppm to %

Postby macoolit » Fri Mar 14, 2008 11:30 am

How to convert 15 mg/kg to ppm.

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


Re: mg/kg to ppm to %

Postby Guest » Fri Mar 14, 2008 7:02 pm

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

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


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.

Re: mg/kg to ppm

Postby JerryCohen » Fri Dec 10, 2010 1:04 am

Convert 3mg/kg to ppm
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Re: mg/kg to ppm

Postby Dirtman » 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.
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Re:mg to mg/kg

Postby robertdadeboe » Mon May 09, 2011 6:26 pm

help me convert milligram to milligram per kilogram

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