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Atomic absorption spectrometric determination of cadmium and lead in soil after total digestion
Author(s) -
Naeem Kashif,
Yawar Wasim,
Akhter Perveen,
Rehana Ishrat
Publication year - 2010
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.535
Subject(s) - cadmium , atomic absorption spectroscopy , environmental chemistry , chemistry , certified reference materials , soil test , graphite furnace atomic absorption , pollution , sediment , geometric mean , digestion (alchemy) , environmental science , detection limit , soil water , soil science , chromatography , geology , mathematics , ecology , paleontology , physics , statistics , organic chemistry , quantum mechanics , biology
To establish the baseline levels of cadmium (Cd) and lead (Pb) in Pakistani soil, samples were collected from various ecological areas of the country. A total digestion procedure using an acid mixture of HFHClO 4 was investigated for heavy metal analysis of soil samples. Concentrations of these elements were measured using flame and graphite furnace atomic absorption spectrometry. Measured elemental contents of Cd and Pb varied from 0.41–1.18 and 22.47–95.75 µg/g with geometric mean 0.73 and 47.99 and geometric standard deviation concentrations of 1.36 and 1.65 µg/g, respectively. Two certified reference materials (IAEA Soil‐7 and IAEA‐405 estuarine sediment) were introduced for the validation of analytical data. The estimated values were compared with other regions of the world and found lower than the world average values, Cd 27% and Pb 13%, and therefore considered comparatively safe and may not be a cause of concern for environmental pollution. Copyright © 2010 Curtin University of Technology and John Wiley & Sons, Ltd.