A slurry technique was applied in the development of a sensitive and
precise method for selenium determination in fish samples without sample
pre-treatment. Several pyrolysis curves were investigated and different
chemical modifiers were tested. Ammonium oxalate was used to improve the
selectivity. Calibration within the range 2.5–25.0 µg
-1Se was performed with aqueous standards.
The detection limit was calculated as 0.33 µg
l-1and the RSD of the measurements was
5.9% for repeatability and 9.2% for reproducibility. The reliability of
the entire procedure was confirmed by analysis of a standard reference
material and by comparison with a microwave digestion
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Journal of Analytical Atomic Spectrometry
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