[Research progress in material preparation and application of magnetism-enhanced in-tube solid-phase microextraction]

Area of Science:

• Analytical Chemistry
• Separation Science
• Sample Preparation Technologies

Context:

• Traditional sample preparation methods often involve complex procedures, large solvent volumes, and analyte loss, failing to meet modern industrial detection demands.
• In-tube solid-phase microextraction (IT-SPME) emerged as a promising technique due to its low solvent consumption and mechanical stability.
• The need for enhanced efficiency and selectivity in sample preparation drives the development of advanced techniques.

Purpose:

• To review the applications and advantages of magnetism-enhanced in-tube solid-phase microextraction (ME-IT-SPME) since its inception.
• To analyze the extraction mechanisms and innovative materials used in ME-IT-SPME.
• To highlight the improvements in sensitivity, precision, and analysis time offered by ME-IT-SPME compared to conventional IT-SPME.

Summary:

• ME-IT-SPME utilizes magnetic fields to enhance the separation and enrichment of target analytes within capillary extraction columns.
• It employs diverse extraction materials like nanomaterials and magnetic hybrids, leveraging interactions such as hydrophobic, hydrogen bonding, and π-π interactions.
• The technique has been successfully coupled with various chromatographic instruments for detecting a wide range of analytes including pesticides, heavy metals, and drug molecules.

Impact:

• ME-IT-SPME significantly improves extraction sensitivity, precision, and efficiency, leading to shorter analysis times.
• Its application spans environmental, food, and biomedical analysis, demonstrating broad utility.
• Future developments focus on material reusability, selectivity, integration with advanced analytical methods, and portable instrumentation for field analysis.