Rapid HPLC-MS method for the simultaneous determination of tea catechins and folates

Area of Science:

• Analytical Chemistry
• Food Science
• Pharmacognosy

Background:

• Tea catechins, gallic acid, and caffeine are key bioactive compounds in tea.
• Accurate quantification of these compounds is essential for quality control and health studies.
• Existing methods for analyzing these compounds can be time-consuming and lack specificity.

Purpose of the Study:

• To develop a rapid and effective High-Performance Liquid Chromatography-Mass Spectrometry (HPLC-MS) method.
• To simultaneously separate and quantify major tea catechins, gallic acid, and caffeine.
• To achieve excellent resolution for folate determination alongside catechins.

Main Methods:

• Utilized a Zorbax SB-C18 column with sub 2 μm particles.
• Employed a linear gradient elution for separation within 9 minutes.
• Applied mass spectrometry detection for enhanced specificity and quantification.

Main Results:

• Achieved simultaneous separation of eight tea catechins, gallic acid, and caffeine in under 9 minutes.
• Demonstrated high specificity and accuracy with low relative standard deviations (<4% in tea drinks, <7% in extracts).
• Obtained excellent resolution for folate determination, both independently and with catechins.

Conclusions:

• The developed HPLC-MS method is effective, rapid, and specific for analyzing tea components.
• This methodology simplifies sample preparation, allowing direct analysis of diluted tea samples.
• It represents a novel approach for the simultaneous, rapid discrimination of catechins and folates.