The equivalent conductance order is $\ce{Br-} > \ce{Cl-} > \ce{F-}$.
$$Λ = \frac{κ}{c},$$
so $Λ$ is proportional to specific conductance?
But in ion chromatography we get peak area where $\ce{F-} > \ce{Cl-} > \ce{Br-}$ (specific conductance, μS/cm) for the same concentration, let us say 1 ppm.
Why?