Supercritical Fluid Chromatography in Pharmaceutical Analysis

Supercritical fluid chromatography (SFC) has emerged as a versatile and sustainable analytical platform in pharmaceutical research and quality control. By exploiting the unique properties of supercritical carbon dioxide as a mobile phase, SFC combines the high diffusivity and low viscosity of gases with the solvating power of liquids. This allows rapid separation of a wide range of drug molecules—from highly non-polar lipids to moderately polar peptides and small‐molecule APIs—often in minutes rather than hours. Modern SFC instruments integrate precision CO₂ pumps, tunable co-solvent delivery and advanced detection modules, notably mass spectrometry, yielding high sensitivity and structural information. Method development relies on careful selection of stationary phase chemistries, gradient programmes and mobile‐phase modifiers or additives to tune retention, selectivity and peak shape. The technique’s reduced solvent consumption and lower environmental footprint address growing regulatory and sustainability imperatives. Applications span chiral and achiral purity assessment, impurity profiling, process monitoring and high-throughput screening. Recent advances in column technology—such as superficially porous particles, novel polymeric phases and enhanced polar stationary phases—have broadened the applicability of SFC to challenging analytes, reinforcing its role as a key tool in pharmaceutical analysis worldwide.

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Supercritical Fluid Chromatography in Pharmaceutical Analysis publication trend

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Technical terms

Supercritical fluid chromatography: A separation technique using a fluid above its critical temperature and pressure as mobile phase, combining gas-like viscosity with liquid-like solvent strength.

Supercritical CO₂: Carbon dioxide held above 31.1 °C and 7.38 MPa, serving as the primary mobile phase in SFC due to its favourable transport and environmental properties.

Chiral stationary phase: A column packing material bearing enantioselective selectors that discriminate between mirror-image isomers of a compound.

Enantioresolution: The process of separating and quantifying individual enantiomers of a chiral molecule.

Co-solvent (modifier): An organic liquid, typically methanol or acetonitrile, added to supercritical CO₂ to adjust polarity, retention and selectivity.

References

1. The Enantioselective Potential of NicoShell and TeicoShell Columns for Basic Pharmaceuticals and Forensic Drugs in Sub/Supercritical Fluid Chromatography. Molecules (2023).
2. Systematic investigations of peak distortions due to additives in supercritical fluid chromatography. Journal of Chromatography A (2020).
3. Investigation of robustness for supercritical fluid chromatography separation of peptides: Isocratic vs gradient mode. Journal of Chromatography A (2018).
4. Supercritical fluid chromatography – Mass spectrometry in metabolomics: Past, present, and future perspectives. Journal of Chromatography B (2020).