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1 Ars Separatoria Acta

1 2007

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Preparation of thioester type of broom extractant with silver selectivity

Furugou H., Ohto K., Kawakita H., Harada H., Inoue K.

Ars Separatoria Acta

2007

No. 5

68-75

A novel tripodal thioester type of broom extractant has been synthesized to investigate selectivity for soft metal ions. Broom extractant exhibited high extractability for silver ion compared with monopodal compound. The complexation ratio of the broom extractant and silver ion was found to be 1:1 from the result of extractant concentration dependency. For stripping of loaded silver ion, complete stripping was achieved with both 1 mol dm-3 thiourea and high concentration of acidic solutions. As an application, electrode response of silver ion was observed at concentration range of 10-3 to 10-6 M silver nitrate using broom extractant as an ionophore.