Abstract
The ternary complex between uranium chromal blue G (Color Index 43835) and cetyltrimethylammonium chloride in aqueous solution has maximal absorbance at pH 4.0–6.2, and 648 nm. Beer's law is obeyed over the range 0.2–2.0 mg l −1 uranium, with a molar absorptivity of 1.32 × 10 5 l mol −1 cm −1 and a sandell sensitivity of 1.8 × 10 −3 μg U cm −2. Only aluminum and beryllium interfere when calcium-1,2-cyclohexane-diaminetetraacetic acid is used as masking agent.
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