双功能深共晶溶剂，用于持续测定水和食品样品中的铬
Dual-function deep eutectic solvent for the sustained determination of chromium in water and food samples.
摘要(中文译文)
本研究描述了一种灵敏、选择性好且环境友好的方法，用于水溶液中痕量六价铬的富集与形态分析。该方法基于使用一种双功能低共熔溶剂（DES），由1,5-二苯基卡巴肼作为氢键供体和油酸作为氢键受体组成。所制备的DES兼具配位特性（通过配体）和从水介质中分离Cr(VI)的能力（归因于油酸的非极性性质），无需传统有机溶剂或络合步骤即可实现高效萃取。本工作的创新之处在于将萃取和络合功能整合到单一溶剂组分中，简化了流程并提高了效率。此外，该溶剂可多次回收利用而性能无显著损失，增强了其分析应用中的环境和经济价值。在理想条件下，Cr(VI)在10至300 µg L浓度范围内校准曲线呈线性。所建立方法的检出限和定量限分别为3.1和10.9 µg L。6次重复测定的相对标准偏差小于4.0%。采用所提出的方法成功测定了水样和茶样中的铬形态并进行了形态分析。使用多种工具评估了所提出策略的绿色度和适用性。
Abstract
A sensitive, selective, and environmentally friendly method for the preconcentration and speciation of trace levels of hexavalent chromium in aqueous solutions is described. The method depends on using a dual-functional DES, consisting of 1,5-diphenylcarbazide as a H-bond donor, and oleic acid as a H-bond acceptor. The prepared DES that combines the coordination property (through the ligand) with the ability to separate Cr(VI) from aqueous media (due to the nonpolar nature of oleic acid), allowing for efficient extraction without the need for conventional organic solvents or a complexation step. The novelty of this work lies in the integration of the extraction and complexation functions into a single solvent component, simplifying the process and increasing its efficiency. Furthermore, the solvent can be recycled multiple times without significant loss of performance, enhancing its environmental and economic value in analytical applications. The calibration graphs were linear across the concentration ranges under ideal conditions, from 10 to 300 µg L for Cr(VI). The limit of detection and limit of quantification of the developed method were 3.1 and 10.9 µg L, respectively. The relative standard deviations for 6 replicate determinations were less than 4.0%. Chromium species were successfully determined and speciated in water and tea samples using the proposed approach. Several tools were used to assess the greenness, and applicability of the proposed strategy.
如何引用
AMA
Nourhan N Hassan, Rania M Eltabey, Wael I Mortada, Fatma T Abdelwahed. Dual-function deep eutectic solvent for the sustained determination of chromium in water and food samples.. Journal of chromatography. A. 2026; doi:10.1016/j.chroma.2026.467186.
APA
Nourhan N Hassan, Rania M Eltabey, Wael I Mortada, Fatma T Abdelwahed (2026). Dual-function deep eutectic solvent for the sustained determination of chromium in water and food samples.. Journal of chromatography. A. https://doi.org/10.1016/j.chroma.2026.467186
GB/T 7714
Nourhan N Hassan, Rania M Eltabey, Wael I Mortada, Fatma T Abdelwahed. Dual-function deep eutectic solvent for the sustained determination of chromium in water and food samples.[J]. Journal of chromatography. A, 2026 doi:10.1016/j.chroma.2026.467186.
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