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Electrospray and tandem mass spectroscopy as tools for anthocyanin characterization
M M Giusti1, L E Rodríguez-Saona, D Griffin
1Department of Food Science and Technology, Oregon State University, Corvallis 97331-6602, USA.
Journal of Agricultural and Food Chemistry
|December 20, 1999
Summary
Electrospray and tandem mass spectrometry (ES-MS and MS-MS) offer a rapid method for identifying anthocyanins. This technique requires minimal sample preparation and can ensure the authenticity of fruit and vegetable extracts.
Area of Science:
- Analytical Chemistry
- Food Chemistry
- Biochemistry
Background:
- Anthocyanins are vital plant pigments with significant health benefits.
- Accurate characterization of anthocyanins is crucial for quality control in food and nutraceutical industries.
- Existing methods for anthocyanin analysis can be time-consuming and require extensive sample preparation.
Purpose of the Study:
- To evaluate the effectiveness of electrospray and tandem mass spectrometry (ES-MS and MS-MS) for anthocyanin characterization.
- To assess the impact of sample purification techniques on analytical performance.
- To determine the potential of ES-MS and MS-MS as rapid identification tools for anthocyanins.
Main Methods:
- Anthocyanin extracts were semipurified using C-18 resin chromatography.
- Samples were analyzed directly via electrospray ionization mass spectrometry (ESI-MS) in aqueous or methanolic solutions.
- Tandem mass spectrometry (MS-MS) was employed to obtain fragmentation patterns.
Main Results:
- Electrospray ionization facilitated rapid and sensitive detection of intact anthocyanin molecular ions.
- Ethyl acetate washing effectively reduced interference from co-extracted compounds.
- MS-MS provided distinct fragmentation patterns, with voltage influencing fragment abundance.
- ES-MS proved to be a fast method for anthocyanin identification with minimal sample preparation.
Conclusions:
- ES-MS and MS-MS are powerful tools for rapid anthocyanin characterization.
- Combined with HPLC, these techniques can reliably monitor the authenticity of anthocyanin-rich food products.
- The described method offers a significant advancement in the analysis of anthocyanins in complex matrices.
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