在化品样本中高效地确定金属离子,这种方法是基于绿色疏水性深性溶剂的反相液-液微提取
Bangfu Liu1, Le-Zhou Zhou2, Guo-Wen He3
1Hunan Electronic Information Industry Institute, Jiefangdonglu 51, Changsha, 410000, Hunan, People's Republic of China. liubangfu2006@163.com.
概括
一种新的绿色溶剂有效地溶解了用于分析的化品. 这种环保方法可提供可靠的提取和确定化品中的.
科学领域:
- 分析化学 分析化学
- 环境化学环境化学
背景情况:
- 化品可能含有有毒的重金属,如 (Cd2+).
- 准确量化Cd2+在化品中的含量对于消费者安全至关重要.
- 现有的方法可能缺乏效率或环保性.
研究的目的:
- 开发和验证一种用于化品中Cd2+的绿色分析方法.
- 为了利用一种新型的疏水性深度浸泡溶剂 (HDES) 来溶解样品.
- 评估回收开发的溶剂系统的可行性.
主要方法:
- 化品样本的溶解使用基于薄荷-六酸的HDES (HDES-1).
- 使用乙烯二胺三酸二盐 (EDTA-2Na) 和溶液提取Cd2+.
- 通过火焰原子吸收光谱学 (FAAS) 量化Cd2+.
主要成果:
- HDES-1 显示出良好的可回收性和可重复使用性.
- 最佳条件包括10°C的20mL/g溶解度,以及 2:1的溶剂-提取剂比率.
- 该方法实现了0.037 mg/kg的检测极限 (LOD),3.5%的相对标准偏差 (RSD) 和85.5-118.3%的恢复.
- 该方法成功地应用于真实化品样本,并用于确定Mg2+,Mn2+和Cu2+.
结论:
- 开发的基于绿色HDES的方法为化品中Cd2+分析提供了可靠和高效的方法.
- Cd2+-EDTA合物的稳定性是提取效率的一个关键因素.
- 该方法为化品中的重金属分析提供了一个可持续的替代方案.
相关概念视频
Extraction: Advanced Methods
463
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
463
Ion-Exchange Chromatography
552
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
552
Capillary Electrophoresis: Applications
408
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
408


