TBP萃取体系辐解产物的分析

Analysis of Radiolytic Products of TBP Extraction System

摘要: 通过红外光谱、气相色谱-质谱联用和液相色谱-质谱联用等分析手段对辐照后的TBP萃取体系进行了较全面的定性分析，推测部分辐解产物可能的分子式，并对辐照后的TBP萃取体系中羰基化合物、异羟肟酸和DBP、MBP的含量进行了测定。分析表明，辐照后的30%TBP-正十二烷-HNO₃体系中存在酮、短链磷酸酯、长链磷酸酯、聚合物、带有醇－OH的磷酸酯、硝化的磷酸酯和硝基烷等6类辐解产物；随着吸收剂量的增大，羰基化合物、DBP、MBP的浓度均增加；随着酸度的增大，羰基化合物和MBP的浓度增加，而DBP的浓度与硝酸浓度关系不大；当c(HNO₃)>1mol/L时，体系中并没有测到异羟肟酸。

Abstract: The radiolytic products of TBP extraction system have been analysed qualitatively and quantitatively with infrared spectrophotometer, gas chromatography-mass spectrometry and liquid chromatography-mass spectrometry. The possible molecular formulas of the radiolytic products were concluded. The concentrations of carbonyl compounds, hydroxamic acids, dibutyl phosphate and monobutyl phosphate were measured in the extraction system after radiolyzed.