Publication details
Utilization of electrodeposition for electrothermal atomic absorption spectrometry determination of gold
| Authors | |
|---|---|
| Year of publication | 2007 |
| Type | Article in Periodical |
| Magazine / Source | Spectrochimica Acta Part B: Atomic Spectroscopy |
| MU Faculty or unit | |
| Citation | |
| Field | Analytic chemistry |
| Keywords | Electrothermal atomic absorption spectrometry; Electrodeposition; Gold |
| Description | Gold was determined by electrothermal atomic absorption spectrometry after electrochemical preconcentration on the graphite ridge probe used as a working electrode. The probe surface was electrochemically modified with Pd, Re and the mixture of both. The electrolysis of gold was performed under galvanostatic control at 0.5 mA. The relative standard deviation for the determination of 2000 ng l-1 Au was not higher than 5.6 % (n=8) for 2 min electrodeposition. The sensitivity of gold determination was reproducible for 300 electrodeposition and atomization cycles. When the probe surface was modified with a mixture of Pd and Re the detection limit was 31 ng l-1 for 2 min electrodeposition, 3.7 ng l-1 for 30 min, 1.5 ng l-1 for one hour and 0.4 ng l-1 for 4 hours electrodeposition, respectively. The procedure was applied to the determination of gold in river water samples. |
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