A sustainable approach to the identification of plant matrices by nano-liquid chromatography and nuclear magnetic resonance spectroscopy: Artichoke leaves sample

What if the key to unlocking plant power didn't require toxic chemicals? Scientists just found a greener way to extract artichoke's hidden compounds.

Artichokes are more than a tasty vegetable—they're a treasure trove of bioactive compounds. But extracting these lipophilic molecules has long relied on chloroform, a solvent that clashes with green chemistry ideals. This study offers a sustainable alternative, comparing traditional chloroform with bio-based solvents like anisole, ethyl acetate, and isoamyl acetate, plus a hydrophobic Natural Deep Eutectic Solvent (NaDES).

Using cutting-edge nano-liquid chromatography and NMR spectroscopy, the team identified fatty acids, sterols, and sesquiterpene lactones like cynaropicrin. The results were striking: isoamyl acetate and anisole performed just as well as chloroform, without the toxicity. Theoretical models based on Hansen Solubility Parameters and surface tension predicted this success, ensuring high recovery rates for key compounds.

The workflow isn't just effective—it's elegantly green. By applying the AgreePrep metric, the study shows how sustainable sample preparation can be, paving the way for future quantitative methods. This is a win for both science and the planet.

Key Points

• Bio-based solvents match chloroform extraction efficiency
• Nano-LC and NMR identify artichoke phytochemicals
• Green workflow preserves recovery of sesquiterpene lactones