On the origin of dips in total fluorescence yield X-ray absorption spectra: Partial and inverse partial fluorescence yield at the L-edge of cobalt aqueous solution

► Partial fluorescence yield L-edge XAS applied on aqueous Co2+ using micro-jet. ► Metal-to-water charge transfer is of the origin of the non-radiative channel at the L-edge. ► Quenched fluorescence at the L-edge leads to a dip in the total-fluorescence-yield.