Autoclave decomposition method for metals in soils and sediments |
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Authors: | M Navarrete-López M P Jonathan P F Rodríguez-Espinosa J A Salgado-Galeana |
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Institution: | (1) Environmental Forensic and Analytical Science Section, Department of Environment and Climate Change, PO Box 29, Lidcombe, NSW, 1825, Australia |
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Abstract: | Leaching of partially leached metals (Fe, Mn, Cd, Co, Cu, Ni, Pb, and Zn) was done using autoclave technique which was modified
based on EPA 3051A digestion technique. The autoclave method was developed as an alternative to the regular digestion procedure
passed the safety norms for partial extraction of metals in polytetrafluoroethylene (PFA vessel) with a low constant temperature
(119.5° ± 1.5°C) and the recovery of elements were also precise. The autoclave method was also validated using two Standard
Reference Materials (SRMs: Loam Soil B and Loam Soil D) and the recoveries were equally superior to the traditionally established
digestion methods. Application of the autoclave was samples from different natural environments (beach, mangrove, river, and
city soil) to reproduce the recovery of elements during subsequent analysis. |
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