Methylglyoxal-hydroimidazolones (MG-Hs) instead of Nɛ-(carboxymethyl)-L-lysine (CML) is the major advanced glycation end-product during drying process in black tea
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This study was to examine the formation of advanced glycation end-products (AGEs) in black tea during drying process at 90, 120, and 150 °C for 1 h. Nine AGEs including Nɛ-(carboxyethyl)-L-lysine (CEL), Nɛ-(carboxymethyl)-L-lysine (CML), three isomers of methylglyoxal-hydroimidazolones (MG-Hs), three isomers of glyoxal-hydroimidazolones (GO-Hs), and argpyrimidine were quantified by using HPLC-MS/MS with isotope-labelled internal standard. Results showed that each AGE during the drying process of 150 °C was significantly higher (p < 0.05) than at 90 and 120 °C, and argpyrimidine was only found in the treatment of 150 °C. MG-H1/3 was first quantified as the major AGE during drying at 120–150 °C, the content respectively reached to (39.66 ± 2.61) μg/g and (58.88 ± 1.76) μg/g after 1 h drying, where CML content only had (19.86 ± 1.02) μg/g and (23.71 ± 1.40) μg/g. This study indicated that arginine derived-AGEs are the key components of black tea AGEs.
Originalsprog | Engelsk |
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Artikelnummer | 127499 |
Tidsskrift | Food Chemistry |
Vol/bind | 333 |
Antal sider | 7 |
ISSN | 0308-8146 |
DOI | |
Status | Udgivet - 2020 |
ID: 248023857