An Experimental Study of Lithium Furnace Emission

1978 ◽  
Vol 32 (1) ◽  
pp. 54-56 ◽  
Author(s):  
J. P. Matousek ◽  
L. E. Smythe
Keyword(s):  
Atomic Absorption ◽  
Graphite Furnace ◽  
Growth Curves ◽  
Atomic Emission ◽  
Diagnostic Techniques ◽  
Atomic Absorption Spectrometer ◽  
Signal To Noise ◽  
Absorption Signal ◽  
Noise Characteristics ◽  
Low Levels

Atomic emission of lithium in a small graphite furnace (CRA 63) was observed using a standard atomic absorption spectrometer with simple optical modifications. Improved diagnostic techniques facilitated a study of lithium atomic emission and atomic absorption signal profiles as a function of temperature. Low levels of lithium were measured relatively free from background emission with considerably improved signal-to-noise characteristics. Analytical growth curves plotted in logarithmic coordinates showed only a slight deviation from linearity over a concentration range of three orders.

Experimental and Theoretical Comparison of the Precision of Flame Atomic Absorption, Fluorescence, and Emission Measurements

1981 ◽  
Vol 35 (3) ◽  
pp. 317-324 ◽  
Author(s):  
N. W. Bower ◽  
J. D. Ingle
Keyword(s):  
Atomic Absorption ◽  
Flicker Noise ◽  
Power Spectra ◽  
Inner Filter Effect ◽  
Atomic Emission ◽  
Noise Power ◽  
Experimental Conditions ◽  
Noise Characteristics ◽  
Fluorescence Measurements ◽  
Flame Atomic Absorption

Theoretical equations and experimental evaluation procedures for the determination of the precision of flame atomic absorption, emission, and fluorescence measurements are presented. These procedures and noise power spectra are used to evaluate the precision and noise characteristics of atomic copper measurements with all three techniques under the same experimental conditions in an H2-air flame. At the detection limit, emission and fluorescence measurements are limited by background emission shot and flicker noise whereas absorption measurements are limited by flame transmission lamp flicker noise. Analyte flicker noise limits precision at higher analyte concentrations for all three techniques. Fluctutations in self-absorption and the inner filter effect are shown to contribute to the noise in atomic emission and fluorescence measurements.

UV-photochemical vapour generation with in situ trapping in a graphite tube atomizer for ultratrace determination of selenium

2015 ◽  
Vol 30 (8) ◽  
pp. 1752-1763 ◽  
Author(s):  
Marcela Rybínová ◽  
Václav Červený ◽  
Petr Rychlovský
Keyword(s):  
Atomic Absorption ◽  
Volatile Compounds ◽  
Graphite Furnace ◽  
Graphite Tube ◽  
Atomic Absorption Spectrometer ◽  
Gf Aas ◽  
Absorption Spectrometer ◽  
Vapour Generation

UV-photochemical vapour generation followed by in situ trapping and atomization of the generated volatile compounds in the graphite furnace atomizer of an atomic absorption spectrometer (GF-AAS) was employed to determine selenium in the sub-ppb range.

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