关于取机制和干扰因子的洞察力,固相取的痕量硫甲醇丰富的干扰因子
Yongjie Li1, Haichuan Zhang2, Wenxin Huo1
1Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi, Jiangsu, 214122, China.
Analytica chimica acta
|March 1, 2026
概括
微量硫甲 (SMX) 的固体相提取 (SPE) 受酸等环境因素的影响. 优化SPE和纠正测量度对于在水中准确检测SMX至关重要.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 分析水质 分析水质
背景情况:
- 硫甲醇 (SMX) 是一种常见的制药污染物,在水体中发现的微量污染物.
- 固相提取 (SPE) 对于SMX分析至关重要,但需要优化.
- 了解SPE机制和影响因素对于准确检测至关重要.
研究的目的:
- 阐明SPE用于SMX提取的机制.
- 系统地评估影响SMX提取效率的因素,使用SPE.
- 为准确的SMX检测和移除研究提供基础.
主要方法:
- 评估了三个SPE弹,HLB显示最高效率.
- 研究了SMX度,无机离子 (HCO3-, Cl-, SO42-, H2PO4-),酸 (HA) 对提取效率的影响.
- 评估了HA分子量和其他自然有机物质 (NOM) 的影响.
主要成果:
- HLB弹实现了75.7-99.3%的SMX提取效率.
- 提取效率随着SMX度的降低而下降,并且受到HCO3-. .的显著干扰.
- 胺酸,特别是低分子量分数,严重干扰了SMX提取,而其他NOM则没有.
- SPE对微量SMX的效率有限,对环境因素高度敏感.
结论:
- 结合和π-π相互作用是SMX SPE的关键机制.
- 环境因素,如HA度,分子量和无机离子显著影响SPE效率.
- 测量SMX度的数值校正对于准确的环境监测是必要的.
- 这项研究提高了SMX检测准确度,并支持对其环境命运的研究.
更多相关视频
相关概念视频
Extraction: Advanced Methods
1.2K
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...
1.2K
Size-Exclusion Chromatography
2.2K
In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
Silica particles offer advantages such as rigidity,...
Silica particles offer advantages such as rigidity,...
2.2K
Atomic Absorption Spectroscopy: Interference
2.2K
Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
2.2K
Capillary Electrophoresis: Applications
1.5K
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,...
1.5K
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences
1.5K
Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
1.5K
Precipitation and Co-precipitation
4.6K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
4.6K


