Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
Food Chem. 2021 May 30;345:128766. doi: 10.1016/j.foodchem.2020.128766. Epub 2020 Dec 8.
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 for Ba, 2.274 and 7.421 µg L for Co, 0.095 and 0.285 mg L for Fe, and 2.138 and 6.614 µg L for Ni. The precision ranged from 3.1 to 4.2%, 1.5 to 8.0%, 1.6 to 6.6%, and 0.4 to 6.1% for Ba, Co, Fe and Ni, respectively. The method accuracy was assessed by recovery tests and comparison of the results obtained by the proposed extraction method with those obtained after acid digestion. Recoveries ranged from 93.5 for Ni to 104.5% for Co.
本文描述了一种通过固-油-水乳液破乳萃取，结合高分辨率连续光源原子吸收光谱法同时测定坚果中钡、钴、铁和镍的方法。萃取产率范围为 94.9%（钡）至 109.8%（铁）。同时在钡、钴、铁和镍的次灵敏线处进行了测量。钡的检出限和定量限分别为 3.819 和 1.146 mg/L，钴的为 2.274 和 7.421 μg/L，铁的为 0.095 和 0.285 mg/L，镍的为 2.138 和 6.614 μg/L。钡、钴、铁和镍的精密度分别为 3.1%至 4.2%、1.5%至 8.0%、1.6%至 6.6%和 0.4%至 6.1%。通过回收试验和与酸消解后得到的结果进行比较评估了方法的准确性，镍的回收率范围为 93.5%至 104.5%，钴的回收率为 97.5%至 104.0%。
