is mg/kg same as ppm
So, a milligram is one ppm of a kilogram; therefore, one ppm is the same as one mil-ligram per kilogram. â¢ milligram/kilogram or â¢ mg/kg or â¢ 0.001/1,000 or â¢ 10-3/103 38 On Tap Fall 2004 What does ppm or ppb mean? What is ppm and what does it mean? Most contaminants are expressed as parts per million (ppm).This means