Z. Kowalewska et al., THE EFFECT OF SAMPLE PREPARATION ON METAL DETERMINATION IN SOIL BY FAAS, Fresenius' journal of analytical chemistry, 362(1), 1998, pp. 125-129
Different methods for the determination of several metals in soils by
flame atomic absorption spectrometry (FAAS) were investigated. Differe
nt procedures for total dissolution of soil: I - HF+HClO4, H3BO3, HCl
digestion (conventional heating), II - HF+HClO4, H3BO3 digestion follo
wed by fusion with LiBO2 (conventional heating) and III - HF+HCl+HNO3,
H3BO3 digestion (microwave heating), as well as a leaching procedure
with HNO3+HClO4, HCL were tested and compared. For quality assessment,
the certified reference material S-l soil was used. For most of the i
nvestigated metals, the best accuracy and precision were achieved when
the procedure I or LII were used. The developed procedure was applied
to the analysis of soil samples from crude oil refinery and dump of p
etroleum origin wastes regions.