Journal of Analytical Methods in Chemistry / 2019 / Article / Tab 1

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.

ParameterSetting

XRF
Initialization elementAg
Initialization channel2210
Tube current250 μA
Tube voltage40 kV
Counting rate1
Vacuum time25 s
Measure time100 s
Replicates3

Flame AAS
ElementAu
Wavelength242.8 nm
Spectral bandwidth0.4 nm
Lamp current2.0 mA
Filter coefficient0.6
Integration time3 s
Burner height6 mm
Flame typeAir-C2H2

Graphite furnace AAS
ElementAu
Wavelength242.8 nm
Spectral bandwidth0.4 nm
Lamp current4.0 mA
Filter coefficient0.1
Integration time3 s
Injection volume20 μL
Measurement methodsPeak area

XRF: X-ray fluorescence spectrometry; AAS: atomic absorption spectrometry.

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