The paper reports a new rapid radioanalytical procedure for the determination of plutonium (Pu) in sediments by solid phase extraction chromatography (SPEC) using Bis-(2-ethylhexyl) carbamoyl methoxy phenoxy-bis-(2-ethylhexyl) grafted resin, abbreviated as Benzodioxodiamide (BenzoDODA) grafted resin. The resin was synthesized and evaluated for its sorption behaviour towards Pu in batch and column mode to determine its efficacy for selective recovery of Pu from sediment samples. The analytical procedure was based on the radiochemical separation of samples by acid digestion, followed by preconcentration of actinides by co-precipitation with Fe(OH)₃ and finally selective recovery of Pu by SPEC using a column filled with BenzoDODA grafted resin. Pu was then radiometrically assayed by preparing alpha disc sources with electro-deposition followed by alpha spectrometry. The method was further validated with IAEA reference materials. This method gives reliable and reproducible results for the activity concentration of Pu in sediment samples within 24 h.

本文报道了一种新的快速放射分析方法，该方法采用固相萃取色谱法（SPEC），使用Bis-（2-乙基己基）氨基甲酰基甲氧基苯氧基-双-（2-乙基己基）接枝树脂，简称为PEC，缩写为苄二氧二酰胺（BenzoDODA）接枝树脂。合成树脂并以分批和柱模式评估其对Pu的吸附行为，以确定其从沉积物样品中选择性回收Pu的功效。该分析程序基于通过酸消解对样品进行放射化学分离，然后通过与Fe（OH）₃共沉淀对pre系元素进行预浓缩。最后使用填充有BenzoDODA接枝树脂的色谱柱通过SPEC选择性回收Pu。然后通过用电沉积，然后用α光谱法制备α圆盘源，用辐射法测定Pu的含量。原子能机构参考材料对该方法进行了进一步验证。该方法在24 h内对沉积物样品中Pu的活性浓度给出了可靠且可重复的结果。