Combination of liquid-based column separations with surface-enhanced Raman spectroscopy

Area of Science:

• Analytical Chemistry
• Spectroscopy
• Nanotechnology

Background:

• Surface-enhanced Raman spectroscopy (SERS) is an advanced analytical technique offering high sensitivity and specificity.
• Its potential for trace analysis in complex biological matrices is significant.
• Integration with column separation methods presents unique challenges.

Purpose of the Study:

• To review experimental and methodological solutions for integrating SERS with column separation techniques.
• To address challenges such as analyte-substrate interactions and background interference.
• To highlight the potential of SERS for sensitive detection in analytical separations.

Main Methods:

• Brief explanation of theoretical and practical aspects of Raman scattering and surface plasmon excitation.
• Description of experimental setups for on-line and at-line coupling with liquid phase separation methods.
• Inclusion of microfluidic devices and discussion of chosen analytical applications.

Main Results:

• Demonstration of enormous signal enhancement in specific SERS applications.
• Evidence of single-molecule detection capabilities.
• Identification of key issues in combining SERS with column separations.

Conclusions:

• SERS shows great promise for sensitive and selective trace analysis when coupled with separation techniques.
• Overcoming challenges related to analyte-substrate interactions and background interference is crucial.
• Advances in experimental arrangements and microfluidics are enabling wider applications.