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四价钚离子与硝酸根能生成Pu(NO_3)_i~(4-i)络离子。一些作者曾用不同方法测定过它的络合常数,但差别很大。其中除实验方法和条件不同外,有的数据处理也不够严格。由于这一体系十分重要,故本文以TBP萃取法,利用简单可靠的对数函数外推法,测定了离子强度为2、4时Pu(NO_3)_i~(4-i)的各级络合常数β_i。S.V.Bagwde用TTA萃取法测得的结果和我们相符,但只测得β_1和β_2(μ=2)。
Tetravalent plutonium ions and nitrate can generate Pu (NO_3) _i ~ (4-i) complex ions. Some authors have used different methods to determine its complexation constant, but very different. In addition to the experimental methods and conditions of different, some data processing is not strict enough. Because of the importance of this system, the complexation of Pu (NO_3) _i ~ (4-i) with Pu (NO_3) _i ~ (4-i) at ionic strength of 2 and 4 was determined by the TBP extraction method and the simple and reliable logarithm function extrapolation method Constant β_i. The results obtained by S.V.Bagwde using the TTA extraction method are in agreement with ours, but only β_1 and β_2 (μ = 2) were measured.