毫微克级铀的溶出伏安法测定——天然水中微量铀的直接测定
ETERMINATIO OF URANIUM IN ng LEVEL BY DIFFERENTIAL PULSE STRIPPING VOLTAMMETRY——DIRECT MEASUREMENT OP URANIUM IN NATURE WATER
-
摘要: 本文介绍毫微克级铀的微分脉冲溶出定量测定法。在pH~4的HAc-NaAc介质中,当铜铁试剂浓度为(3×10~(-3)-1×10~(-2))‰时,有一个清晰且有富集效果的铀峰,峰电位~-1.1V(相对于Ag/AgCl电极)。峰电流与铀浓度在0.05-6.6ng/ml之间有线性关系。测定下限为0.05ng/ml,方法的相对标准偏差为4%。此法可用于直接测定天然水中微量铀。Abstract: Differential pulse stripping voltammetry (DPSV) has been developed to detect trace uranium.With supporting electrolyte HAc-NaAc (pH 4) and in the presence of cupferron (3×10-3-1×10-2‰) , a peak of uranium enriched on the hanging mercury drop electrode found (EF -1.1V vs.Ag/AgCl electrode) . The detection lim(?)t is 0.05ng/ml. The calibration curve is linear over the range 0.16-6.6ng/ml. Uranium in nature water has alo been measured directly in this work.
-
-
[1] Koch. O. G. et al., Handbuch der Spurenalyse, Vol. 1. Berlin Springer-Verlag, 1974. [2] 肖铨盛,分析化学,1(3) ,22(1973) . [3] 姚修仁等,分析化学,10,581(1982) . [4] Lai, T. T. et al., Anal.Chim. Acta, 76(2) , 309(1975) . [5] Zanello, P. et al., Talanta, 23(2) ,103(1976) . [6] Issa, I. M. et al., Acta Chim.(Budapost). 85(4) , 445(1975) . [7] 陈海安等,第三届全国分析化学年会文集,349页,1083年. [8] Ismail, M. et al., J. Eleetroanal.Chem.Inter acial Electrochem., 108(2) , 229(1980) . [9] Dentacher R. L. et al., Analyst, 102,929(1977) . [10] Donoso, G et al., Anal. Chim. Acta, 42, 109(1968) .
计量
- 文章访问数: 513
- HTML全文浏览量: 0
- PDF下载量: 1147