Research Article
Comparative Study on Two Pretreatment Processes for Chemical Phase Analysis of Gold in Geological Samples by Atomic Absorption Spectrometry
Table 1
Instrument operating parameters.
| | Parameter | Setting |
| | XRF | | Initialization element | Ag | | Initialization channel | 2210 | | Tube current | 250 μA | | Tube voltage | 40 kV | | Counting rate | 1 | | Vacuum time | 25 s | | Measure time | 100 s | | Replicates | 3 |
| | Flame AAS | | Element | Au | | Wavelength | 242.8 nm | | Spectral bandwidth | 0.4 nm | | Lamp current | 2.0 mA | | Filter coefficient | 0.6 | | Integration time | 3 s | | Burner height | 6 mm | | Flame type | Air-C2H2 |
| | Graphite furnace AAS | | Element | Au | | Wavelength | 242.8 nm | | Spectral bandwidth | 0.4 nm | | Lamp current | 4.0 mA | | Filter coefficient | 0.1 | | Integration time | 3 s | | Injection volume | 20 μL | | Measurement methods | Peak area |
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XRF: X-ray fluorescence spectrometry; AAS: atomic absorption spectrometry.
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