Abstract
A HPLC-MS/MS method for simultaneous determination of four matrine-type alkaloids (matrine, oxymatrine, sophocarpine and sophoridine) in honey was established and was applied to 567 Chinese honey samples. The overall detection rate was 61.0 % and all eight Sophora viciifolia Hance honey samples were detected with the average content of 1183.3 μg/kg. Among 383 Acacia honey samples, matrine-type alkaloids have the highest detection rates in Gansu (98.8 %) and Shaanxi (86.5 %) provinces, which were significantly correlated with the distribution of S. viciifolia Hance. Moreover, matrine-type alkaloids in fruits and flowers of S. viciifolia Hance were as high as 7.06 g/kg and 2.65 g/kg respectively. The melissopalynological analysis showed that the concentration of oxymatrine was positively correlated with the pollen frequency of S. viciifolia Hance (R2 = 0.737) in representative Acacia honey samples. It can be concluded that the matrine-type alkaloids in Chinese honeys come from the nectariferous plants S. viciifolia Hance.
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