Analytical applications of ternary complexes-III A spectrofluorimetric method for the determination of submicrogram amounts of copper.
A sensitive spectrofluorimetric procedure for the determination of copper(II) in the range 0.001-0.006 ppm [1-6 x 10(-7) g) has been developed, utilising the ternary complex system [Cu(phen)(2) Rose Bengal]. The complex is extracted into chloroform, diluted with ammoniacal acetone and its fluorescence measured at 570 mmu with excitation at 560 mmu. The fluorescence is constant for several days. The reaction is rendered selective for copper by a preliminary extraction of bis(2, 9-dimethyl-l, 10-phenanthroline)copper(I) nitrate from an EDTA medium.
Bailey
B W
BW
Chemistry Department, Imperial College of Science and Technology, London S.W.7, U.K.
Dagnall
R M
RM
West
T S
TS