Results from fitting dust depletion sequences for the 22 GRBs in our H₂ sample. The relatives abundances of the elements used for the fits are plotted with dark blue dots. Upper and lower limits for the other elements are plotted in light blue. The black line indicates the best FIT, and the dashed lines and gray shaded areas the corresponding 3-σ confidence intervals. A contour plot of dust-corrected metallicity [M/H] versus F_* is shown right next to every depletion sequence.