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本文研究了氨三乙酸(NTA)、二乙撑三胺五醋酸(DTPA)、和α-羟基异丁酸(α-HIBA)水溶液的γ辐解。测定了辐解气体量和破坏率与吸收剂量的关系。同时还测定了辐照溶液的pH值的变化。吸收剂量5×10~7rad时,pH=7.0的0.1M NTA/NH_4NO_3水溶液,pH=7.0的0.05MDTPA/NH_4NO_3水溶液,pH=3.7的0.4M α-HIBA/NH_4NO_3水溶液及0.4 M α-HIBA水溶液的辐解破坏率分别为～56%,～87%,～45%和37%。三种络合剂的辐解气体主要成分为氢和二氧化碳。NTA的辐解产物除气体外主要是亚氨基二乙酸(IDA)。
In this paper, the γ-radiolysis of aqueous solutions of NTA, DTPA and α-hydroxyisobutyric acid (α-HIBA) was studied. The relationship between the amount of radiolysis gas and the destruction rate and absorbed dose was determined. The change in pH of the irradiated solution was also determined. When the absorbed dose was 5 × 10-7rad, 0.1M NTA / NH_4NO_3 aqueous solution with pH = 7.0, 0.05MDTPA / NH_4NO_3 aqueous solution with pH = 7.0, 0.4M α-HIBA / NH_4NO_3 aqueous solution with pH = 3.7 and 0.4M α-HIBA aqueous solution Radiation destruction rates were ~ 56%, ~ 87%, ~ 45%, and 37%, respectively. The three complexing agent of the main components of the dissolved gas is hydrogen and carbon dioxide. The radiolysis products of NTA are mainly iminodiacetic acid (IDA) except gas.