Related Experiment Video
Updated: Jun 17, 2026

10:12
Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis
Published on: July 1, 2017
Separation and preconcentration of persistent organic pollutants by cloud point extraction
Shunping Xie1, Man Chin Paau, Cheuk Fai Li
1Department of Chemistry, Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, Hong Kong SAR, China.
Journal of Chromatography. A
|December 18, 2009
Summary
Cloud point extraction (CPE) offers an efficient, environmentally friendly method for detecting trace persistent organic pollutants (POPs). This review highlights CPE
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
Background:
- Persistent organic pollutants (POPs) pose significant risks to human health and ecosystems.
- Detecting trace levels of POPs in complex samples is analytically challenging.
- Traditional methods often require extensive sample preparation.
Purpose of the Study:
- To review the application of cloud point extraction (CPE) for persistent organic pollutants.
- To evaluate CPE as a preconcentration technique for trace POPs analysis.
- To discuss the coupling of CPE with various instrumental methods.
Main Methods:
- Comparison of different extraction techniques for POPs.
- Detailed explanation of the cloud point extraction (CPE) methodology.
- Review of CPE hyphenation with analytical instruments.
Main Results:
- Cloud point extraction (CPE) is an efficient and environmentally benign sample pretreatment technique.
- CPE effectively preconcentrates trace and ultra-trace levels of POPs from complex matrices.
- CPE coupled with instrumental methods enhances POPs detection capabilities.
Conclusions:
- CPE is a valuable tool for the determination of POPs in environmental and biological samples.
- The review provides insights into the latest advancements and applications of CPE for POPs.
- CPE offers a promising approach for sensitive and sustainable POPs analysis.
Related Concept Videos
Extraction: Advanced Methods
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 formed in...
Precipitation and Co-precipitation
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...
High-Performance Liquid Chromatography: Elution Process
In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
High-Performance Liquid Chromatography: Introduction
High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
In HPLC, two phases play a critical role in the separation process:
Capillary Electrophoresis: Applications
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,...

