Simultaneous solid phase extraction of Au (III) and Pd (II) as chloride complexes on naphthalene-methyltrioctyl ammonium chloride adsorbent

作者：Pourreza N^*; Elhami Sh

来源：Canadian Journal of Analytical Sciences and Spectroscopy, 2006, 51(5): 260-266.

• gold
• palladium
• solid phase extraction
• atomic absorption spectrometry
• naphthalene adsorbent
• ore samples

A simultaneous solid phase extraction procedure for preconcentration of Au (III) and Pd (II) and determination by atomic absorption spectrometry has been established. The analytes were adsorbed on naphthalene-methyltrioctyl ammonium chloride as AuCl4- and PdCl42- complexes. The adsorbed metal complexes were then eluted from the column with a thioacetamide solution and determined by flame atomic absorption spectrometry. The effect of different variables such as pH, reagent concentration, the concentration and volume of the eluent, flow rate and interfering ions on the recovery of the analytes was investigated. The calibration graph was linear in the range 5-480 ng mL(-1) of gold and 5-500 ng mL(-1) of palladium in the initial solution with r = 0.9983 and 0.9989, respectively. The limit of detection based on 3S(b) criterion was 2.3 and 3.5 ng mL(-1) for gold and palladium, respectively. The relative standard deviation for ten replicate measurements of 40 ng mL(-1) gold and 50 ng mL(-1) palladium of was 3.2 and 3.4% respectively. The method was applied to the determination of gold and palladium in ore and water samples.

• 出版日期2006