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This paper describes the simultaneous determination of Ba, Co, Fe, and Ni in nuts by high-resolution continuum source atomic absorption spectrometry after extraction induced by solid-oil-water emulsion breaking. Extraction yields ranged from 94.9 for Ba to 109.8% for Fe. Simultaneous measurements were carried out at secondary lines of Ba, Co, Fe, and Ni. The limits of detection and quantification were, respectively, 3.819 and 1.146 mg L-1 for Ba, 2.274 and 7.421 µg L-1 for Co, 0.095 and 0.285 mg L-1 for Fe, and 2.138 and 6.614 µg L-1 fo
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