Determination of trace thorium in environmental water by flow injection-spectrophotometry
Received date: 2005-03-28
Online published: 2010-10-01
The anion exchange resin separation and preconcentration is carried on by using flowinjection technique.Th(Ⅳ)reacts with Cl- to form an anion complex,and is separated and preconcentrated by anion exchange resin.The anion complex is desorbed with a solution of 0.25 mol /L HNO3- 1.5% citric acid and is determined by spectrophotometry with FAsA- Ⅲ. The maximum absorption wavelength is 656 nm. The mass concentration of thorium accords with Beer′s Law in the range of 0 - 700 μg/L. The detection limit of this method is 1.0 μg/L.The sensitivity of the determination of the thorium after separation and preconcentration can be improved by several times,and the co-ions in quantity do not distrub the determination of thorium.
Luo Daocheng, Liu Junfeng . Determination of trace thorium in environmental water by flow injection-spectrophotometry[J]. Industrial Water Treatment, 2005 , 25(10) : 49 -51 . DOI: 10.11894/1005-829x.2005.25(10).49
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