Related Experiment Video
Updated: May 17, 2025
09:35
Dispersion of Nanomaterials in Aqueous Media: Towards Protocol Optimization
Published on: December 25, 2017
28.2K
Enhanced microextraction kinetics: Sorptive-dispersive vs. conventional techniques on rotating disks
Nicolás Morales1, Alejandra Molina-Balmaceda1, Daniel Arismendi1
1Department of Inorganic and Analytical Chemistry, Faculty of Chemical and Pharmaceutical Sciences, University of Chile, Olivos 1007, Independencia, 8380492, Santiago, Chile.
Analytica Chimica Acta
|May 15, 2025
Summary
Rotating Disk Sorptive Dispersive Extraction (RDSDE) significantly speeds up analyte extraction compared to Rotating Disk Sorptive Extraction (RDSE). This novel dispersive technique offers faster equilibrium and improved efficiency for analyzing aqueous samples.
Area of Science:
- Analytical Chemistry
- Environmental Science
- Materials Science
Background:
- Introduced Rotating Disk Sorptive Dispersive Extraction (RDSDE) as a novel approach based on Stir Bar Sorptive Dispersive Microextraction (SBSDME).
- RDSE allows direct kinetic comparison with dispersive counterparts, unlike traditional Stir Bar Sorptive Extraction.
- RDSDE aims to quantify the kinetic advantages of sorbent-based dispersive microextraction techniques.
Purpose of the Study:
- To confirm and quantify the kinetic advantages of sorbent-based dispersive techniques over non-dispersive counterparts.
- To explore the benefits of combining RDSE principles with the dispersion of magnetic sorbent materials using RDSDE.
- To present the first direct kinetic comparison between RDSDE and conventional RDSE.
Main Methods:
- Utilized magnetic activated carbon (MAC) derived from avocado seeds as the sorbent material.
- Optimized RDSDE parameters including sorbent amount (10 mg MAC), extraction time (20 min), pH (2), and desorption solvent (acetone, 10 min).
- Validated the RDSDE method and performed kinetic comparisons using triclosan (TCS), bisphenol A (BPA), ibuprofen (IBU), and 1-hydroxy-ibuprofen (1-OH-IBU) as analytes.
Main Results:
- RDSDE achieved extraction equilibrium in approximately 20 minutes, significantly faster than RDSE.
- Initial extraction velocities for RDSDE were 12 times higher for BPA and 43 times higher for IBU compared to RDSE.
- Optimized conditions yielded optimal analytical response with minimal time and resource utilization.
Conclusions:
- RDSDE is a more efficient extraction technique due to its rapid extraction equilibrium and dispersive mechanism.
- The dispersive mechanism in RDSDE significantly accelerates analyte extraction, demonstrated by steeper extraction profiles.
- RDSDE shows potential as a faster and more efficient method for extracting target compounds from aqueous samples.
Keywords:
Avocado seed-derived sorbentKinetic comparisonMagnetic activated carbon (MAC)Rotating disk sorptive dispersive extraction (RDSDE)Rotating disk sorptive extraction (RDSE)More Related Videos
10:31Diffuse Reflectance Infrared Spectroscopic Identification of Dispersant/Particle Bonding Mechanisms in Functional Inks
Published on: May 8, 2015
13.6K
09:19Capturing Actively Produced Microbial Volatile Organic Compounds from Human-Associated Samples with Vacuum-Assisted Sorbent Extraction
Published on: June 1, 2022
4.0K
Related Concept Videos
01:09Analyte Adsorption and Distribution
541
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
541
01:15Optimizing Chromatographic Separations
295
Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
295
01:05Centrifugation
2.1K
Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...
2.1K
01:30Capillary Electrophoresis: Applications
305
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,...
305
01:15Dialysis
554
Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
554