Studies on the voltammetric behaviour of salicyl fluorone and gallium-salicyl fluorone complex |
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Authors: | Xiaoli Zhang Rongli Chen Lizeng Wang Chengsong Ma |
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Institution: | (1) Department of Chemistry, Shandong University, Jinan, Shandong, Peoples Republic of China |
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Abstract: | In the NH4Cl supporting electrolyte, within the pH range from 1 to 5, an irreversible adsorptive reducing wave of salicyl fluorone(SAF) was obtained. The electrode process was verified as follow: On the surface of mercury electrode, the adsorption of SAF obeys Frumkin isotherm.In 0.2 mol/l potassium hydrogen phthalate/HCl buffer solution, at pH 3.0, the sensitive adsorptive complex wave of Ga-SAF was obtained by linear sweep voltammetry. The composition of the electroactive complex was determined as Ga:SAF = 1 1. The peak height of the complex is proportional to the concentration of Ga(III) in the range of 1.5 × 10–9 to 6.0 × 10–7 mol/l, the detection limit is 1.0× 10–9 mol/l. The proposed method has been applied to the determination of gallium content in aluminium alloys. |
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Keywords: | adsorption voltammetry salicyl fluorone gallium-complex |
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