Micro-determination of gold using N-cyanoacylacetaldehyde hydrazone |
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| Authors: | Mohamed A. Kabil Shaban E. Ghazy Mohamed A. Mostafa Ahmed A. El-Asmy |
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| Affiliation: | 1. Chemistry Department, Faculty of Science, Mansoura University, P.O. Box 15, Mansoura, Egypt
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| Abstract: | A reliable and rapid procedure for the flotation and micro-determination of Au(III) using N-cyanoacylacetaldehyde hydrazone (CyAH) is proposed. CyAH forms a blue 1:1 complex (Kf=4.1×105 mol?1l?1) with Au(III) at pH 3–7. The maximum absorbance is obtained after 7 min; instantaneously by adding 3.3×10?3 mol/l H3PO4 or by heating to 55°C. Beer's law is obeyed for 1–30 ppm of Au(III) with a molar absorptivity of 0.3×104 l mol?1 cm?1 at 550 nm. |
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