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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2013, Volume 64, Issue 1,





PETRONELA-BIANCA PAVEL, ELENA DIACU, CONSTANTIN HORIA BARBU
Microwave-Assisted Digestion Procedures for Total Lead and
Cadmium Content Determination in Copsa Mică Soils

Abstract:

The aim of the study was to establish the best method of digestion for determination of total content of certain heavy metals (Cd and Pb) in Copşa Mică soils using different microwave-assisted digestion procedures. Five digestion procedures using various acid combinations (HCl, HF and HNO3) and volumes were tested, using two Certified Reference Materials (CRMs) and two polluted soil samples collected from Copşa Mică. Cadmium and lead content in the digests were analyzed using Flame Atomic Absorption Spectrometry (FAAS). The analytical performance parameters and recoveries showed that all five applied digestion procedures are suitable for the determination of total Cd and Pb content in polluted soils, but the best digestion procedure for Cd analysis in present case was the adapted EPA 3052 procedure with a mixture of nitric and hydrofluoric acid, while for Pb is the adapted ISO 11466 procedure with aqua regia. Keywords: microwave digestion, soil, heavy metals, FAAS

Issue: 2013, Volume 64, Issue 1
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