mg/kg to ppb

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mg/kg to ppb

Postby jenn » Wed Apr 21, 2004 5:23 am

How do I convert 0.5 mg/kg to PPB or PPT?
jenn
 

Postby shill » Wed Apr 21, 2004 8:09 am

0.5 mg/kg = 0.5 ppm = 500 ppb = 500 000 ppt. The difference between 1 mg and 1 kg is 1 000 000 (one million), so 1 mg/kg is one part per million (1 ppm). To convert from parts per million (ppm) to parts per billion (ppb), simply multiply by 1000 (this works because the fractions 1/1 000 000 and 1000/1 000 000 000 are equivalent).
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