摘要：Quantification of heavy metals (Cr, Cu, Zn, K, Ca, Fe and Mn) in water and soils samples was performed through atomic and molecular spectrometry. The validity of three leaching agents (ethylenediaminetetraacetic acid, acetic acid and deionized water) was compared in soil samples to potassium, calcium, iron and manganese by means of atomic spectrometry. Acetic acid was the best leaching agent for all metals except for iron, and EDTA was the second best.Two experiments were developed for water samples. First, precipitation was used to separate toxic metals and, secondly, the speciation of Cr (III) and Cr (VI) was carried out using diphenylcarbazide and ethylenediaminetetraacetic acid to set up complexes selectively. It was proved that the removal of Cr, Cu and Zn by precipitation of the hydroxide was effective obtaining low ranks.
关键词：Atomic and Molecular Spectroscopy; Determination; Potassium; Calcium; Iron; Manganese; Chrome; Cupper; Zinc; Soil; Water
