When you add 50 ppm of CO2 and you only need 46.64 ppm, then the difference of 'Free' CO2 equals 50 - 46.64 = 3.36 ppm.

Published April 21, 2019 15:06 by J.J.P. (Hans) Zijlstra, Director at GeoChemTec

When you add 50 ppm of CO2 and you only need 46.64 ppm, then the difference of 'Free' CO2 equals 50 - 46.64 = 3.36 ppm.