核反應器爐水中極微量銅之測定

Determination of Extremely Trace Amount of Copper In Reactor Coolant By Graphite Furnace Atomic Absorption Spectrometry

柯正雄(C. H. Ke) ； 羅建苗(J. M. Lo) ； 葉錫溶(S. J. Yeh)

《化學》 41卷4期 (1983/12) Pp. 132-137

https://doi.org/10.6623/chem.1983027

摘要

銅是核反應器水冷却劑循環系統的重要腐蝕產物之一，近年來奇異公司發現核燃料護套銹垢區域性腐蝕與銅頗有關連，那麼對使用銅管冷凝管的核反器而言，銅殘渣可能是造成燃料破損的主要原因，因此水系統中銅含量的正確測量，列爲水化學的重要數據。本研究發展非火焰原子吸光分析法，以自動噴霧装置，直接注人水樣於碳棒電爐，而且靈敏度可達0.1 ppb，本研究另發展一種藉溶劑萃取技術的前濃縮配合上述的非火焰原子吸光分析，則可測定小至0.01 ppb的水試樣中的銅。

並列摘要

Copper is one of the important elements in corrosion products existing in nuclear reactor water coolant. Recently, it was reported by G.E. company that a certain high content of copper was always found in the crud induced localized corrosion products on fuel rod cladding. Therefore copper may become more significant in water chemistry control especially for those nuclear reactors using copper-based material like bronze as condenser. In this study, an automatic system connected with flameless atomic spectrometry 'was employed for the direct determination of copper in the reactor coolant sample. The method is convenient and fast and its sensitivity can reach 0.1 ppb. A preconcentration procedure via solvent extraction in conjunction with the above flameless atomic spectrometry was developed for the determination of copper in the water sample as low as 0.01 ppb.