Visual inspection of the concentration-time profiles for each of the eight patients showed predicted concentrations were higher than the observed concentration following a single observation.
However, the observed concentration of MEHHP for the next observation is 195 µg/L, whereas the model predicted 488 µg/L.
While equal weight is given to all residuals in the first step, different weights can then be attributed to the residuals, based on the magnitude of the observed concentration or the chemical identity of the compound observed.
To what extent does the observed concentration replicate the mass-media model?
Samples (including standards and QCs) were run in duplicate and mean fluorescence intensity (MFI) was used to calculate the observed concentration.
However, we also see in Fig. 4 that it is still not enough to explain the observed concentration of FA in these two locations.
We demonstrate that the observed concentration levels are in agreement with a recently published thermomechanical model.
The observed concentration profiles are non-linear, unlike what would be expected if the hydrostatic pressure alone influenced the profiles.
SO42− was found to behave conservative, i.e., the observed concentration could be well simulated without any reactions.
The observed concentration dependence with respect to Pb2+ is in accordance with the Nernstian behaviour of the UPD process.
