Fast separation of (poly)phenolic compounds from apples and pears by high-performance liquid chromatography with...

Area of Science:

• Food Chemistry
• Analytical Chemistry
• Phytochemistry

Background:

• Polyphenolic compounds are vital bioactive constituents in fruits like apples and pears.
• Accurate quantification and identification of these compounds are crucial for nutritional and health studies.
• Existing analytical methods may lack the efficiency or resolution required for comprehensive polyphenol profiling.

Purpose of the Study:

• To develop and optimize a High-Performance Liquid Chromatography (HPLC) method for analyzing polyphenolic compounds in apples and pears.
• To compare the efficacy of different mobile phase modifiers (methanol vs. acetonitrile) for polyphenol separation.
• To establish a rapid and reliable analytical technique for fruit polyphenol research.

Main Methods:

• Analysis of polyphenolic compounds using HPLC with a C18-modified silica stationary phase.
• Gradient elution employing mixtures of phosphoric acid with either methanol or acetonitrile.
• Detection and provisional identification of polyphenols using diode-array detection (DAD).

Main Results:

• Complete separation of target polyphenolic compounds was achieved with both methanol and acetonitrile-based gradients.
• The methanol-based gradient offered a significantly faster separation time, completing the analysis in 20 minutes.
• Diode-array detection proved useful for the preliminary identification of polyphenols lacking commercial standards.

Conclusions:

• HPLC with C18-modified silica and gradient elution is a suitable technique for analyzing apple and pear polyphenols.
• Methanol is the preferred mobile phase modifier for achieving rapid polyphenol separation.
• The developed method provides a robust tool for the analysis of fruit polyphenols, aiding further research into their health benefits.