Rapid sample screening method for authenticity controlling vanilla flavors using a CE microchip approach with...

Area of Science:

• Analytical Chemistry
• Food Science
• Separation Science

Background:

• Vanilla flavor analysis is critical for food quality control.
• Detecting adulteration requires sensitive and selective analytical methods.
• Existing methods may lack speed or portability for routine food analysis.

Purpose of the Study:

• To develop and validate a rapid capillary electrophoresis microchip method for analyzing key vanilla flavor compounds.
• To enable sensitive and selective detection of vanillin (VAN) and ethyl vanillin (EVA) for food fraud detection.
• To assess the method's reliability and applicability in real food samples.

Main Methods:

• Capillary electrophoresis (CE) microchips with electrochemical detection (CE-ED).
• Separation of vanillic alcohol (VOH), ethyl maltol (EMA), maltol (MAL), ethyl vanillin (EVA), and vanillin (VAN).
• Utilized a borate buffer (pH 9.5, 20 mM) and a 1 M nitric acid detection reservoir.

Main Results:

• Selective and sensitive detection of target analytes in under 200 seconds.
• Reproducible control of electroosmotic flow (EOF) with migration time RSD < 3%.
• High accuracy (recoveries > 90%) and acceptable resolution (Rs > 1.5) independent of sample matrix.

Conclusions:

• The CE-ED microchip method provides a fast, reliable, and accurate approach for analyzing vanilla flavor compounds.
• This technique demonstrates significant potential for routine food control, particularly in identifying adulterated vanilla products.
• The developed method offers a valuable tool for combating food fraud in the flavor industry.