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安培滴定法测定镎的研究

DETERMINATION OF NEPTUNIUM BY AMPEROMETRIC TITRATION
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摘要 在0.5mol/l的酸性溶液中,用AgO将镎氧化到Np(Ⅵ),过量AgO用氨基磺酸破坏,在3mol/l酸度下,用Fe(Ⅱ)滴定Np(Ⅵ)至Np(Ⅳ),过量Fe(Ⅱ)用标准重铬酸钾回滴,用安培法指示其终点。测定2mg镎时,精密度优于0.3%。与恒流库仑法进行样品核对,两种方法之间的相对偏差为0.22%,测定结果吻合。还作了在铀共存下镎的精密测定。 Neptunium is oxidized to Np(Ⅵ)in 0.5mol/l acid medium by AgO. Excess AgO is de-stroyed by aminesulfonic acid.Then Np(Ⅵ)is titratcd to Np(Ⅳ)in 3mol/l acid medium byFe(Ⅱ).Excess Fe(Ⅱ)is re-titrated by standard potassium dichromate solution. In order toobtain precise and accurate results for such a small sample, weight burets are frequently usedtaking aliquots and the titrants.A platinum indication electrod and a calomel reference elec-trod are used to measure the cell amperage. The relative standard deviation for the determi-nation of 2mg neptunium is less than 0.3%.The relative deviation of the present methodcompared with the constant current coulometry is less than 0.22%.
出处 《核化学与放射化学》 CAS CSCD 北大核心 1994年第1期43-48,共6页 Journal of Nuclear and Radiochemistry
关键词 测定 安培滴定法 Neptunium Accurate determination Amperometric titration
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参考文献2

  • 1白春义,原子能科学技术,1978年,2期,157页 被引量:1
  • 2团体著者,超铀元素分析,1976年 被引量:1

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