1 mg/kg = 1 ppm
1 mg = 1000 micrograms (ug)
so 10 ug/kg = 0.01 mg/kg = 0.01 ppm
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by "ppm" I assume you mean "parts per million". 30 percent means 30 per 100, and 1,000,000 (a million) divided by 100 is equal to 10,000. This is the ration between ppm and percent. 30x10,000 is equal to 300,000, so 30 percent is equal to 300,000 ppm
Yes.
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1 ppm is one part per million, or one millionth - percentage (which is latin for per hundred) wise, 1 ppm is .0001%
Yes, micrograms per gram is the same as ppm. Ppm means parts per million. There are a million micrograms in a gram.