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海洋的放射性监测对于保护我国海洋水域和海洋生物资源有重要的意义.海洋生物对某些种类的放射性物质有较高的富集作用,有的可达成千上万倍,长期食用这种被严重污染的鱼虾贝类,可能对人体产生不良后果.原子能工业和研究单位在向海洋排放废物时,如不严加控制就将造成海洋的放射性污染。在排放的放射性物质中,对人体危害最大的是锶-90 、钴-60和碘-131;鱼、海藻,虾,贝,蟹对于钴-60都有较高的浓集系数。人在食用这些食品以后,钴-60进入肠胃,能被全部吸收,在体内积累,因此,在海洋放射性监测中,钴-60 占有重要地位.文献曾报导用两维γ谱仪对海藻中钴和铯的放射性同位素作不破坏分析.但生物样品中放射性核素的测定,由于其含量很低,通常都需要采用适当的化学方法进行分离.吸附法和离子交换法可以浓集多种核
Radioactive monitoring of the oceans is of great significance for the protection of marine waters and marine living resources in our country. Marine organisms are highly enriched in certain types of radioactive materials, some thousands of times that in long-term consumption, Polluted fish, shrimp and shellfish may have adverse health consequences to human beings, and atomic energy industry and research institutes will cause radioactive pollution to the oceans if they are not strictly controlled when discharging wastes to the sea. Among the radioactive substances emitted, strongest damage to human body is strontium-90, cobalt-60 and iodine -131; fish, seaweed, shrimp, shellfish, crab for cobalt -60 have a higher concentration coefficient. Cobalt-60 occupies an important position in the radioactivity monitoring of the ocean after people eat these foods, cobalt-60 into the stomach, can be fully absorbed, accumulated in the body.Relevance reported in the literature using two-dimensional γ spectrometer on the seaweed cobalt And cesium radioisotopes do not destroy the analysis.But the determination of radionuclides in biological samples, due to its low content, usually require the use of appropriate chemical methods for separation.Adsorption and ion exchange method can be concentrated in a variety of nuclear