NDLI: Sequential and simultaneous determination of four elements in soil samples using high-resolution continuum source graphite furnace atomic and molecular absorption spectrometry

Content Provider	Royal Society of Chemistry (RSC)
Author	Dessuy, M. B. Andrade, J. B. de Dullius, M. Boschetti, W. Vale, M. G. R. Orlando, M. Welz, B.
Copyright Year	2016
Abstract	An analytical method has been developed for the sequential and simultaneous determination of Cd, Cr, Fe and Al (via the AlH molecule) in soil samples using high-resolution continuum source graphite furnace atomic and molecular absorption spectrometry and direct solid sample analysis. First, Cd (228.802 nm) was determined using 800 °C and 1700 °C as the pyrolysis and atomization temperatures, respectively. Subsequently, after changing the wavelength, Cr (425.433 nm), Fe (425.076 nm) and Al (425.315 nm) were determined simultaneously from the same sample aliquot using 2600 °C as the atomization (Cr and Fe) or vaporization (AlH) temperature. Al determination was carried out using the diatomic molecule AlH without adding a molecule-forming reagent. The interference caused by Al in Cd determination was minimized by using 10 μL of a 10% v/v H2SO4 solution in all measurements. Aqueous standard solutions were used for calibration and the limits of detection and quantification obtained were 7.3 and 24 pg mg−1 for Cd, 0.13 and 0.45 ng mg−1 for Cr, 0.07 and 0.23 μg mg−1 for Fe and 0.42 and 1.4 μg mg−1 for Al, respectively. The concentration values for Cd, Cr, Fe and Al obtained from the soil certified reference material (CRM) Montana Soil I (NIST SRM 2710a) analysis were in agreement with the reported ones. The precision of the measurements, expressed as the relative standard deviation, was better than 10%. Six soil samples from a vineyard field were investigated and the results are in accordance with the Brazilian legislation.
Starting Page	1269
Ending Page	1277
Page Count	9
File Format	HTM / HTML PDF
ISSN	02679477
Volume Number	31
Issue Number	6
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/c6ja00031b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	NIST Al Graphite Absorption spectroscopy Pyrolysis Wavelength Diatomic molecule Reagent Certified reference materials Montana National Institute of Standards and Technology Coefficient of variation Vineyard
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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