The rate constants for the reaction e^ + EDTA were measured as a function of the pH by the pulse-radiolysis technique. Between pH = 6 and pH = 10 this rate constant can be represented by the equation k = 4.7 X 10 e X (fraction of HEDTA 3 ") + 1.0 X 10* X (fraction Hj EDTA 2 ~)M~1 s" 1 . Also the rate constants for reactions of e^j with the following metal-EDTA complexes were measured: CuEDTA 2 -, HgEDTA 2 CoEDTA 2 ", InEDTA", NiEDTA 2 GaEDTA", MnEDTA 2 ZnEDTA 2 -, CdEDTA 2 PbEDTA 2 -. Ionic strength variation indicates that the reacting ions are not hydrolized to an appreciable amount at pH = 11.5. It is found that some of the products show light absorption in the region between 300 and 400 nm.

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