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海水的組成是极为复什的,共有六十余种元素;而铀的濃度很低,平均为(2±1)×10~(-6)克/升。这使分析工作造成許多困难,通常都需要經过冗长的分离和富集手續。海水中鈾的富集,早年多采用氢氧化铁等无机共沉淀剂,但得到的沉淀是难洗难滤的胶体,且选擇性不高。以后則多采用萃取法,但自庞大的体积中进行萃取,往往有一定的困难。 1956年Korkisch等首先提出离子交換-极譜法快速测定海水和河水中的铀,但
The composition of seawater is extremely complex, a total of more than 60 kinds of elements; uranium concentration is very low, with an average of (2 ± 1) × 10 ~ (-6) g / l. This has caused many difficulties in analytical work, often requiring lengthy separation and enrichment procedures. Uranium enrichment in seawater, early use of iron hydroxide and other inorganic coprecipitant, but the precipitate is hard to be difficult to filter the colloid, and the selectivity is not high. After more use of extraction, but since the huge volume of extraction, there are often some difficulties. In 1956 Korkisch first proposed ion exchange - polarographic rapid determination of seawater and river water uranium, but