What does ppm or ppb mean?

One milligram in a kg is 1 ppm (by mass). one liter (l) of pure water at 4ºc and 1 standard atmosphere pressure weighs exactly 1 kg, so 1 mg/l is 1 ppm.

Millirem conversion factors - radiation - dose equivalent

Millirem conversion factors - radiation - dose equivalent all radiation - dose equivalent conversion tables

Radiation exposure and pregnancy fact sheet

health physics society specialists in radiation safety radiation exposure and pregnancy everyone is exposed to radiation every day. people are continuously...

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