Yuanxian Xia, Hesheng Qian. A new method for determination of trace amount thorium—spectrophotometric determination of thorium in aqueous phase by chlorophosphonazo-mA[J]. Nuclear techniques, 1986, 09(1): 53-54,64,13.
Yuanxian Xia, Hesheng Qian. A new method for determination of trace amount thorium—spectrophotometric determination of thorium in aqueous phase by chlorophosphonazo-mA[J]. Nuclear techniques, 1986, 09(1): 53-54,64,13.DOI:
In this paper the spectrophotometric method for determination of trace amount of thorium in weak acidic medium by chlorophosphonazo-mА is described. The composition of the complex was estimated to be 1:4 by slope ratio method. The apparent molar absorption of thorium at 675 nm is 9.2×10
4
. Beer's law is obeyed for 0—12.0µg of thorium in 10ml solution. The coefficient of variation for thorium is 0.88%. The method has been applied to the determination of trace amounts of thorium in the extraction process of thorium.
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