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本文介绍了环境水中~(210)Po的分析方法。取水样5升,利用氯化钙和碳酸钠生成的碳酸钙沉淀,以氢氧化铁作载体,玻璃粉作凝聚剂,使~(210)Po共沉淀而浓集。用盐酸溶解沉淀后,在盐酸—柠檬酸介质中使~(210)Po自镀在银片或者纯紫铜片上;样品晾干后,在低本底金硅面垒型α计数器上测量。全过程回收率达(82±4)%,其它α放射体和天然的短寿命放射体RaD(~(210)Pb)、RaE(~(210)Bi)对本方法测定~(210)Po的干扰不明显。
This article describes the analysis of ~ (210) Po in ambient water. Take 5 liters of water, the use of calcium carbonate and sodium carbonate generated calcium carbonate precipitation, iron hydroxide as a carrier, glass powder as a coagulant, so that the ~ (210) Po coprecipitated and concentrated. After dissolving the precipitate with hydrochloric acid, ~ (210) Po was self-deposited on silver flake or pure copper foil in a hydrochloric acid-citric acid medium; the sample was dried and then measured on a low background gold-silicon counter α. The recovery rate of the whole process was (82 ± 4)%. Other alpha emitters and natural short-lived emitters RaD (~ (210) Pb) and RaE (~ Not obvious.