Carbon-based sorbents: carbon nanotubes.

Area of Science:

• Materials Science
• Analytical Chemistry
• Environmental Science

Background:

• Carbon nanotubes (CNTs), discovered in 1991, are advanced materials with broad applications.
• CNTs exhibit excellent adsorption properties, making them suitable for purification and enrichment tasks.
• Their use in food, medicine, and environmental sample analysis has grown significantly.

Purpose of the Study:

• To provide a comprehensive review of CNT-based extraction methodologies.
• To detail various solid-phase extraction (SPE) and solid-phase microextraction (SPME) techniques utilizing CNTs.
• To highlight the versatility of CNTs in analytical sample preparation.

Main Methods:

• Review of existing literature on CNT applications in extraction.
• Categorization of CNT-based extraction methods into SPE and SPME.
• Detailed description of sub-types within SPE (cartridge, disk, dispersive, μ-SPE) and SPME (fiber, electrosorption-enhanced, stir bar, needle trap, hollow fiber).

Main Results:

• CNTs are effective adsorbents in various SPE and SPME formats.
• Different CNT-based SPE and SPME modes offer diverse capabilities for sample preparation.
• The review consolidates information on numerous CNT-based extraction techniques.

Conclusions:

• CNTs are highly effective materials for advanced extraction and purification processes.
• A wide array of CNT-based SPE and SPME techniques are available for analytical applications.
• This review serves as a valuable resource for researchers utilizing CNTs in sample preparation.