NO_3~-对硼同位素测定的干扰及其消除

The Effect of NO_3~- on the Isotopic Measurement of Boron and its Elimination

中文关键词:  硼,同位素测定,离子交换分离,NO_3~-干扰

英文关键词:Boron, Isotopic measurement, Interference of NO3- ion.

中文摘要:

      在石墨存在下测定Cs2BO2 离子是硼同位素测定的最佳方法，但NO3-却存在严重的干扰，本文对这种干扰进行了详细的研究。为了避免NO3-的干扰，本文改进了硼的分离提取方法，完全避免了NO3-的引入，取得了满意的测定结果。

英文摘要:

      The effect of NO3- on the isotopic measurements of boron based on Cs2BO2 ion with graphite loading has been investigated. The measured 309/308 ratio is considerably reduced by the presence of NO3- ion, especially in the presence of mannitol, due to the formation ofCs2CN ion, which produces ion peaks at messes of 308 and 309. The procedure of ion exchange using Amberlite IAR 743 resin,a boron-spesific resin, and OH-Dowex 1 resin forextracting boron from sample solution is developed. The .NO3- ion can be removed from sample solution during sample preparation by using this procedure.