DETERMINATION OF FE(II) AND H2O2 IN ATMOSPHERIC LIQUID WATER BY PEROXYOXALATE CHEMILUMINESCENCE

The chemiluminescence reaction of oxygen with bis(2,4,6-trichloropheny l)oxalate (TCPO) in the presence of Fe(II) has bean investigated under the analytical and mechanistic point of view. Its suitability for the determination of Fe(II) as well as H2O2 in atmospheric liquid water b y using a new static fiberoptic luminometer (FOL) and a flow-injection analysis (FIA) system is demonstrated. Results obtained so far sugges t, that chemiluminescence is generated by superoxide ion (O-2(-)) prod uced by autoxidation of Fe(II) through dissolved oxygen. The analytica l method based on this reaction shows high sensitivity and detection l imits below 100 nM Fe(II). Its application to rain water analysis indi cates that Fe(II) and H2O2, may be coexistent in the atmospheric liqui d phase.