Abstract Measurements of the volatility of iodine from irradiated iodide (I−) solutions at concentrations down to 10−9 M are reported and compared with earlier data at higher I− concentrations (10−5 – 10−4 M). There is a significant pH effect on the volatility, as observed in other studies; the effects of concentration and temperature are less important. The measured volatilities cannot be wholly accounted for by I2, because its extensive hydrolysis at low [I−] would imply unrealistically high HOI concentrations. The partition coefficient of hypoiodous acid (HOI) is uncertain, but the reported values suggest it is too high to give the measured volatilities. It is therefore concluded that atomic iodine (I•) is an important contributor to iodine volatility under these low-concentration conditions.

中文翻译：

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低浓度碘水溶液的辐射化学

摘要 对低至 10-9 M 浓度的辐照碘化物 (I-) 溶液中碘的挥发性进行了测量，并与较高 I- 浓度 (10-5 – 10-4 M) 的早期数据进行了比较。正如在其他研究中观察到的那样，pH 值对挥发性有显着影响；浓度和温度的影响不太重要。测量的挥发性不能完全由 I2 解释，因为它在低 [I-] 下的广泛水解意味着不切实际的高 HOI 浓度。次碘酸 (HOI) 的分配系数不确定，但报告的值表明它太高而无法给出测量的挥发性。因此得出的结论是，在这些低浓度条件下，原子碘 (I•) 是导致碘挥发性的重要因素。