A hybrid FIA/HPLC system incorporating monolithic column chromatography

Area of Science:

• Analytical Chemistry
• Biochemistry
• Forensic Science

Background:

• High-performance liquid chromatography (HPLC) offers high separation efficiency but can be complex and less portable.
• Flow injection analysis (FIA) provides speed, versatility, and portability but often lacks sophisticated separation capabilities.

Purpose of the Study:

• To develop a hybrid instrument combining the strengths of HPLC and FIA.
• To achieve automated, efficient separation and detection of target analytes in complex matrices.

Main Methods:

• Integration of solvent gradient generation (milliGAT pumps), monolithic column chromatography, and chemiluminescence detection.
• Development of a versatile, portable instrument manifold.
• Application of tris(2,2'-bipyridyl)ruthenium(III) and acidic potassium permanganate for detection.

Main Results:

• The hybrid system demonstrated performance comparable to HPLC in automation and separation efficiency.
• Successfully determined six opiate alkaloids and four biogenic amines in human urine samples.
• Maintained the speed, portability, and versatility characteristic of FIA.

Conclusions:

• The developed hybrid FIA/HPLC system offers a powerful analytical tool for complex sample analysis.
• This approach provides a balance between analytical rigor and practical operational advantages.
• The system shows promise for rapid screening and quantification in various fields, including clinical and forensic toxicology.