Abstract：The sample was treated by microwave digestion with three-step temperature program using aqua regia as the digestion system. With 8% (volume) aqua regia was selected as determination medium, the determination of silver within range of 1.6-600.0g/t in copper concentrate samples was realized by flame atomic absorption spectrometry (FAAS). The interference tests indicated that the interference of copper and iron in sample with the determination of silver could be ignored. Under the selected experimental conditions, the calibration curve was prepared with the mass concentration of silver as x-axis and the measured absorbance as y-axis. The linear correlation coefficient was 0.9998. The detection limit of method was 1.6g/t. Three certified reference materials of copper concentrate were determined according to the proposed method for 11 times, respectively. The results were consistent with the certified values, and the relative standard deviations (RSD, n=11) were between 0.23% and 0.66%. Five groups of copper concentrate samples with different silver contents were selected and determined according to the proposed method. Based on the range of silver content, the determination results were compared with acid dissolution-FAAS and fire assaying-titration method in national standard GB/T 3884.2-2012, respectively. It was indicated that the determination results were basically consistent.
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