基于深共晶溶剂分解的反相分散液液微萃取法测定植物油中的铅和镉。
Reversed-phase dispersive liquid-liquid microextraction based on decomposition of deep eutectic solvent for the determination of lead and cadmium in vegetable oil.
机构信息
Department of Analytical Chemistry, Institute of Chemistry, Saint-Petersburg University, Saint Petersburg State University, SPbSU, SPbU, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia.
Department of Analytical Chemistry, Institute of Chemistry, Saint-Petersburg University, Saint Petersburg State University, SPbSU, SPbU, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia.
出版信息
Food Chem. 2022 Mar 30;373(Pt B):131456. doi: 10.1016/j.foodchem.2021.131456. Epub 2021 Oct 23.
In this work, a reversed-phase dispersive liquid-liquid microextraction procedure based on the decomposition of deep eutectic solvent was suggested for the first time. The procedure was utilized for fast and simple separation of lead and cadmium from vegetable oil samples. The procedure assumed mixing of oil sample and DES based on menthol, formic acid and water. Water as component of DES promoted its decomposition in sample matrix resulting menthol dissolution in the sample phase and dispersion of aqueous formic acid solution. In this procedure menthol acted as a dispersive solvent during DES decomposition for dispersion of aqueous formic acid solution. The metals were determined by the square-wave anodic stripping voltammetry. The limits of detection, were 0.01 µg kg for lead and 0.006 µg kg for cadmium. The RSD was less then 6% for both analytes. The enrichment factor was 36 and 39 for lead and cadmium, respectively.
在这项工作中，首次提出了基于深共晶溶剂分解的反相分散液液微萃取方法。该方法用于快速简单地从植物油样品中分离铅和镉。该方法假设油样与基于薄荷醇、甲酸和水的深共晶溶剂混合。水作为深共晶溶剂的组成部分促进了其在样品基质中的分解，导致薄荷醇溶解在样品相中并分散在甲酸水溶液中。在该方法中，薄荷醇在深共晶溶剂分解过程中充当分散溶剂，用于分散甲酸水溶液。金属通过方波阳极溶出伏安法测定。检出限，铅为 0.01μgkg，镉为 0.006μgkg。两种分析物的 RSD 均小于 6%。富集因子分别为铅和镉的 36 和 39。
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