Characterization of black and green tea using ESI-QTOF- MS and data evaluation by principle component analysis
| Type: |
Application |
Poster |
Metabolomics Studies, Gen. Pharma & Chemistry |
| Number: |
Technology |
Metabolomics 2010 |
OTOF |
| Year |
Products |
2010 |
|
| |
Author |
| |
Aiko Barsch, Gabriela Zurek, Wiebke Lohmann;
Bruker Daltonik GmbH, Fahrenheitstraße 4,
28359 Bremen, Germany |
| |
Reference |
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Metabolomics 2010, Amsterdam |
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Abstract |
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- LC-ESI-Qq-TOF-MS analysis in combination with PCA was applied to differentiate green, Darjeeling and black tea samples
- SmartFormula3D (combining exact mass and isotopic pattern information in MS and MS/MS
- spectra) allowed for sum formula generation of relevant compounds differentiating samples
- Removing caffeine for PCA calculation revealed a separation of the samples according to oxidation grade obtained during tea processing
- Compounds with higher abundance in black tea could be shown to belong to the class of flavonoids
- Green tea samples contained higher amounts of catechins compared to black teas
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