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  • 1 Institut voor Kernphysisch Onderzoek (IKO) Amsterdam (The Netherlands)
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A kit-like procedure is described for the labelling of Hippuran by exchange in a melt with carrier-free iodide-123 directly formed from the decay of123Xe. Decay and subsequent melting for 15 min at 180°C are performed in one and the same ampoule. This results in a transfer of 95% of the123I-activity into Hippuran with a residual123I-content of <1.0%. Quality control is based on thin-layer chromatography. Contaminants are discussed and a comparison is made with commercial preparations of Hippuran-131I.