Separation and preconcentration trace amounts of gold by using modified organo nanoclay closite 15A

AUTOR(ES)

Mohammadi, Sayed Zia, Seifollahi, Naimeh, Afzali, Daryoush

FONTE

Química Nova

DATA DE PUBLICAÇÃO

2010

RESUMO

The application of organo nanoclay 5-(4-dimethylamino-benzylidene) rhodanine-immobilized as a new, easily prepared, and stable solid sorbent for preconcentration trace amounts of Au(III) ions in aqueous solution is presented. The sorption of Au(III) ions was quantitative in the pH range of 2-4, and quantitative desorption occurred instantaneously with 10.0 mL of a mixture containing 0.5 mol L-1 Na2S2O3 and KSCN. Various parameters, such as the effect of pH, breakthrough volume, extraction time, and interference of a large number of anions and cations have been studied. The proposed method has been applied for determination of trace amount of gold in water samples.

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