Voltammetric Trace Determination of Uranium

The accurate quantification of trace amounts of uranium generally requires complicated and expensive analytical equipment such as instruments based on inductively coupled plasma mass spectrometry (ICP-MS). In contrast, with the Metrohm 797 VA Computrace, dissolved uranium in the form of U(VI) can be determined easily and at reasonable expenditure. The voltammetric determination of uranium with the 797 VA Computrace is just as accurate and efficient as current ICP-MS methods. The AdCSV method (Adsorptive Cathodic Stripping Voltammetry) for the voltammetric determination of the uranium content is based on complexing U(VI) with chloranilic acid (2,5-dichloro-3,6-dihydroxy-1,4-benzoquinone). The uranium content can be determined down to the ng/L range.