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~(89)锶和~(90)锶是环境放射性中的重要核素,人们不断地对它们进行着监测。已经报导过许多从钙中分离这两种核素的放射分析法,如发烟硝酸或玫棕酸盐沉淀法,用EDTA之类螯合剂的色层离子交换法,以及用二-(2-乙基己基)磷酸液-液萃取法。也有用二(2-乙基己基)磷酸液-液萃取分离~(90)锶的子体~(90)钇后,再测定~(90)锶。然而,发烟硝酸及其废物,对分析者来讲是很讨厌的,色层离子交换法适宜同时分析许多样品,但是,分析几个样品时就很费时间。在玫棕酸盐沉淀法和二-(2-乙基已基)磷酸萃取分离法中,钙对锶的污染是不可忽视的。而环境样品中,又常常
Strontium ~ (89) and strontium ~ (90) are important radionuclides in the environment and they are continuously monitored. A number of radiological assays have been reported for the separation of these two nuclides from calcium, such as fuming nitric acid or myristate precipitation, chromatography by ion exchange with chelating agents such as EDTA, and bis (2- Ethylhexyl) phosphoric acid liquid - liquid extraction method. The strontium of (90) is also measured after liquid-liquid extraction of (90) yttrium from (90) strontium with di (2-ethylhexyl) phosphoric acid. However, fuming nitric acid and its wastes are annoying to analysts and chromatographic ion exchange is suitable for simultaneous analysis of many samples, however, it can take time to analyze several samples. In the melem caproate precipitation method and the di - (2-ethylhexyl) phosphate extraction and separation method, calcium pollution of strontium can not be ignored. In environmental samples, often