The present paper shows that the reagent 2

9-dimethyl-l

10-phenanthroline (which we called as new copperon) reacts with hydrogen peroxide in alkaline solution

in the presence of metallic ion

such as Cu(Ⅱ)

Pb(Ⅱ)

Cod)

Fe(Ⅲ) and Ni(Ⅱ) respectively

as a catalyst to produce chemiluminescence of a greenish color. The mechanism of this chemiluminescence reaction has been discussed in the present paper and is believed that a peroxy-icn is formed from hydrogen peroxide by the catalytic reaction of the complex of Cu(Ⅱ) with the new coppercn in the process

and the peroxy-ion is then reacts with the new copperon to produce the chemiluminescence emission. The product of this chemiluminescence reaction has been separated out by thin layer chromatc-graphy and determined by various methods

such as UV

IR and fluorescence spectrophotometry respectively.In addition

the analytical application of this new chemilumineselce reaction has been carried out in our laboratory

and the determination of Cu(Ⅱ) with the chemiluminsecence system is shown in this paper. The lower detection limit of Cu is e×10

-9

. The linear range of response is 1×10

-8

to 4×10

-7

g/ml. No effect of foreign ions

except certain

amounts of Co(Ⅱ)

Mn(Ⅱ) Ni(Ⅱ) Cd(Ⅱ)

and Cr(Ⅲ) respectively for the determination of 0.1 ppm Cu(Ⅱ). It can be applied satisfactorily to the determination of Cu in alumnum alloy.