Department of Chemistry, Alzahra University, P.O. Box 1993893973, Tehran, Iran.
Department of Chemistry, Alzahra University, P.O. Box 1993893973, Tehran, Iran.
Food Chem. 2019 Dec 1;300:125180. doi: 10.1016/j.foodchem.2019.125180. Epub 2019 Jul 13.
An isonicotinic acid hydrazide (INAH) chemically modified fumed silica, as a novel adsorbent, was designed for the preconcentration and determination of Hg (II) ions in fish samples via the solid phase extraction followed by the hydride generation atomic absorption spectrometry (HG-AAS). In this work, the efficiency of the synthesized adsorbent was investigated to determine its ability for the extraction of the Hg (II) ions from the aqueous solutions. The extraction efficiency was investigated by optimizing of different experimental conditions, such as pH, sample volume, flow rate, adsorbent dosage, and eluent type. Under the optimal conditions, a linear calibration curve for the solid phase extraction method was obtained in the range of between 0.12 and 16.5 μg L. The obtained detection limit and preconcentration factor were 0.018 μg L and 25, respectively (RSD > 3%). The proposed optimized method was successfully applied to fish samples.
一种异烟酰肼（INAH）化学修饰的沉淀二氧化硅作为一种新型吸附剂，通过固相萃取和氢化物发生原子吸收光谱法（HG-AAS）用于鱼样中 Hg(II)离子的预富集和测定。在这项工作中，研究了合成吸附剂的效率，以确定其从水溶液中萃取 Hg(II)离子的能力。通过优化不同的实验条件，如 pH 值、样品体积、流速、吸附剂用量和洗脱液类型，研究了萃取效率。在最佳条件下，固相萃取方法在 0.12 到 16.5μg/L 之间获得了线性校准曲线。得到的检测限和预浓缩因子分别为 0.018μg/L 和 25（RSD>3%）。该优化方法成功应用于鱼样。
