I am performing absorption study: carbamazepine drug removal using plant extract capped magnetic nanoparticle (MNPs). In that 5, 10, 15, 20 ppm of drug concentration and 50mg of MNPs I am using. now from zero our to 5 hour (per hour) I am taking OD.
from there I am trying to get percentage of removal :control (zero) initial hour reading minus final hour reading, divided by initial value, multiply by hundred.
also tried with changing pH parameter 3, main in 7 ph
but In every case i found after 2 hour OD value getting increased beyond control value.
If anybody having any idea regarding please explain me.