Di-2-pyridyl ketone 2-furoylhydrazone as a reagent for the fluorimetric determination of low concentrations of gallium and its application to biological samples.

Di-2-pyridyl ketone 2-furoylhydrazone (DPFH) has been examined as a sensitive spectrofluorimetric reagent for the determination of gallium. 4 rapid procedure for the fluorimetric determination of th i s ion at the 2-800 ng ml-1 level at pH 3.S4.1 (Aex 395 nm, he, 473 nm) has been established. The detection limit is 2 ng ml-1 and the relative standard deviation is 2.4% (40 p.p.b. of gallium). Interferences have been evaluated, and the method has been applied to the determination of gallium in biological samples (after destruction of the organic matter with HNOB H202).