To establish a method for the flavonoid components of honey from different geographical origins by ultra performance liquid chromatography-quadrupole-time of flight mass spectrometry(UPLC-Q-TOF-MS) and conduct an evaluation of antioxidant activity.
After sample preparation,UPLC-Q-TOF-MS was employed for analysis. Chemometric methods including principal component analysis(PCA) and orthogonal partial least squares discriminant analysis (OPLS-DA) were used to screen differential compounds of honey from different geographical origins. Additionally, the differences in their antioxidant activities were evaluated based on the scavenging rates of 2,2’-azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) cation radical and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical.
The 79 kinds of flavonoid compounds were identified by UPLC-Q-TOF-MS. Honeys from different origins were clearly distinguished, and 17 kinds of flavonoids,including quercetin, nobiletin and kaempferol, were screened as characteristic markers for origin differentiation. Hongqi village honey (HQC) exhibited the strongest scavenging rates against ABTS radical cation and DPPH radical.
The combination of UPLC-Q-TOF-MS and chemometrics can effectively differentiate honey from different geographical origins. This study provides a reference for the authentication of honey origin.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |