Slurry sampling for the rapid determination of cobalt, nickel and copper in soils and sediments by electrothermal atomic absorption spectrometry |
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Authors: | Ignacio López-García Mateo Sánchez-Merlos Manuel Hernández-Córdoba |
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Institution: | (1) Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, E-30071 Murcia, Spain |
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Abstract: | Electrothermal atomic absorption procedures for the rapid determination of cobalt, nickel and copper in soil and sediment samples are presented. The samples are suspended in a hydrofluoric acid solution before being injected into the electrothermal atomizer. Prior mild heating in a microwave oven is recommended for nickel and copper determination. No modifier other than hydrofluoric acid is required. The conventional ashing step is unnecessary since the fast-heating programmes lead to well defined atomization profiles with low background levels that can be corrected using a common deuterium device. Calibration is performed directly using aqueous standards. The results obtained for six certified reference materials confirm the reliability of the procedures. |
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Keywords: | cobalt nickel copper soil sediment slurry electrothermal atomic absorption spectrometry |
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