Current status and future trends on automated multidimensional separation techniques employing sorbent-based...

Area of Science:

• Analytical Chemistry
• Separation Science

Background:

• Complex matrices necessitate efficient sample preparation for accurate analyte determination.
• Online multidimensional separation techniques are vital for preconcentrating analytes and removing interferents.
• Extraction columns play a critical role in the success of these techniques.

Purpose of the Study:

• To review the main features of extraction columns used in online multidimensional chromatographic techniques.
• To discuss instrumental setups and recent applications of these techniques.
• To highlight properties and enhancements of extraction columns for low-concentration analyte determination.

Main Methods:

• Review of literature on online multidimensional solid-phase separation techniques.
• Critical description of instrumental setups and extraction column variations.
• Discussion of applications in environmental, food, and bioanalysis.

Main Results:

• Extraction column material (e.g., PEEK, fused silica, stainless steel) and sorbent configuration (filled, open tubular) significantly impact performance.
• Online techniques, including in-tube solid-phase microextraction and turbulent flow chromatography, are effective for complex matrices.
• Recent applications demonstrate the utility of these methods in diverse analytical fields.

Conclusions:

• Extraction columns are key components in multidimensional separation systems for trace analysis.
• Continuous research on extraction columns aims to improve analyte recovery and detection limits.
• These techniques offer powerful solutions for analyzing challenging samples in various scientific domains.