Ok, then maybe the Fractionator isn’t the right tool for you. What you could to instead, is to create Fractions from the solution object. It’s still a bit clunky but it would work something like this:
start = 1
end = 2
from CADETProcess.fractionation import Fraction
mass = solution.fraction_mass(start, end)
volume = solution.fraction_volume(start, end)
fraction = Fraction(mass, volume)
print(
fraction.mass,
fraction.volume,
fraction.concentration,
fraction.purity,
)
In a future release, this could look something like
fraction = solution.create_fraction(start, end)
In case you’re only interested in the concentration of some components, see also this post.