conversion of parts per million to milligrams/100 grams

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conversion of parts per million to milligrams/100 grams

Postby sandy w » Tue Aug 16, 2005 11:22 pm

can parts per millionbe converted to milligrams per 100 grams/
for example....05 ppm vs. 8mg/100g
sandy w
 

Re: conversion of parts per million to milligrams/100 grams

Postby Guest » Wed Aug 17, 2005 12:01 am

sandy w wrote:can parts per millionbe converted to milligrams per 100 grams/
for example....05 ppm vs. 8mg/100g


8 mg / 100 g = 8x10^(-3) g / 100 g = 8 x 10^(-5)
= 80 x 10^(-6) = 80 ppm.

Since mg and kg are 10^6 apart, 5 ppm = 5 mg/kg,
or 0.5 mg/100 g
Guest
 


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