@misc{oai:repo.qst.go.jp:00076748,
 author = {Zheng, Jian and Wang, Hai and Ni, Youyi and Huang, Zhaoya and Aono, Tatsuo and Zheng, Jian and Aono, Tatsuo},
 month = {Sep},
 note = {In this study, a green and rapid analytical method was developed for determination of 237Np and Pu isotopes in environmental and nuclear decommissioning samples, such as soil, marine sediment and concrete samples. The methods consisted of NH4HF2 fusion incorporated with procedure for CaF2/LaF3 co-precipitation, extraction chromatography or anion-exchange chromatography and ICP-MS measurement. ICP-MS, as an atom-counting approach that counts the atoms themselves, irrespective of their decay mode, specific activity, or half-life, is gradually replacing/has replaced conventional radiometric methods, for ultra-sensitive analysis of actinides. The fusion procedure was done at 250oC on a portable hot plate instead of in a cumbersome muffle furnace and took only 15 min. Chemical recoveries of 237Np and Pu after completing the NH4HF2 fusion method and chromatographic separation for 0.5-1 g sample were approximately 70-90%. The NH4HF2 fusion was capable of completely releasing actinides from samples that were pre-ignited at temperatures over 450 oC to 1000 oC, which was comparable to releases obtained by the hazardous and time-consuming HNO3-HF digestion. Additionally, because HF is not used in any procedure of the NH4HF2 fusion, a safer and greener alternative to HNO3-HF digestion is realized for rapid 237Np and Pu isotopes determination in soil, marine sediment and concrete samples. It takes approximately one day for 10 sample analysis (NH4HF2 fusion and sample transferring, 0.5 h; CaF2/LaF3 coprecipitation and filtration, 1.5 h; chromatographic separation and sample preparation, 5.5 h; ICP-MS measurement, 0.5 h) which is less than the conventional acid digestion methods., 日本分析化学会第６８年会},
 title = {Development of low-temperature fusion using ammonium hydrogen fluoride for rapid determination of actinides in environmental and nuclear decommissioning samples},
 year = {2019}
}