超铀元素
化学
核素
电感耦合等离子体质谱法
三级四极质谱仪
放射化学
色谱法
放射性核素
质谱法
钚
锕系元素
污染
选择性反应监测
核化学
串联质谱法
物理
生态学
量子力学
生物
作者
Chenyang Peng,Jiang Sun,Feng Zhang,Shan Xing,Xingchen Liu,Cancan Chen,Xiaolin Hou,Keliang Shi,Wangsuo Wu
标识
DOI:10.1021/acs.analchem.3c04699
摘要
The urine bioassay method for transuranium nuclides (237Np, 239,240,241Pu, 241Am, and 244Cm) is needed to quickly assess the potential internal contamination in emergency situations. However, in the case that the analysis of multiple radionuclides is required in the same sample, time-consuming/tedious sequential analytical procedures using multiple chromatographic separation resins would have to be employed for the separation of every single radionuclide. In this work, a rapid method for the simultaneous determination of transuranium nuclides in urine was developed by using triple quadrupole inductively coupled plasma mass spectrometry (ICP–MS/MS) combined with a single DGA resin column. The chemical behaviors of Np/Pu and Am/Cm on the DGA resin were consistent in 8–10 mol/L HNO3 and 0.005–0.02 mol/L NaNO2 when 242Pu and 243Am were selected as tracers for Np/Pu and Am/Cm yield monitoring. Based on their different reaction rates with O2, 237Np, 239,240,241Pu, 241Am, and 244Cm in the same solution were simultaneously measured by ICP–MS/MS in the same run. The elimination efficiency of 238U+ tailing (7.43 × 10–9), 238U1H16O2+/238U16O2+ (8.11 × 10–8) and cross contamination of 241Pu and 241Am (<1%) were achieved using 10.0 mL/min He–0.3 mL/min O2 even if the eluate was directly measured without any evaporation. The detection limits of transuranium nuclides were at the femtogram level, demonstrating the feasibility of ICP–MS/MS for simultaneous transuranic radionuclides urinalysis. The developed method was validated by analyzing the spiked urine samples.
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