by alfadog » Tue Jul 11, 2006 12:31 am
Sure
micro = ì = 10e-6
kilo = k = 10e+3
The "difference" is 10e+/-9
ppm = 10e+/-6
The difference is 10e+/-3
so multiply ug/kg by 1000 to get ppm (1 ug/kg = 1000 ppm)
assuming that you mean ppm by weight (mass)
John
alfadog
white trash philosophizer