Fig. (1) Fluorescence labelling of aluminium adjuvants. Aluminium adjuvants were labelled with various concentrations of lumogallion by overnight incubation, washed and re-suspended in 150 mM NaCl. Fluorescence from re-suspended Alhydrogel^® (●) and Adju-Phos^® (■) particles was measured by excitation at 490 nm and emission at 580 nm.