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Objective To investigate the content of 16 kinds of rare earth elements in commercial vegetables and evaluate the health risks caused by the intake of rare earth elements in vegetables for users in Gansu Province. Methods Samples from 6 categories were collected from 13 areas in Gansu Province, and the content of the 16 kinds of rare earth elements were measured by inductively coupled plasma mass spectrometry. According to the health risk analysis method recommended by United States Environmental Protection Agency (USEPA), the allowable daily intake (ADI) was used to assess the health risk of rare earth elements in commercial vegetables. Results The earth elements of vegetables sold in Gansu were mainly Sc, Y, Ce, La, Nd, Pr, with detection rate exceeds 50%, the total content of rare earth elements in the 6 types of vegetables was 0.1764 mg/kg, ranked from high to low as follows: Melon and fruit vegetables>leafy vegetables>stem vegetables>solanaceous fruit vegetables>root vegetables>bean vegetables. There were no significant differences in the content of rare earth elements among different vegetable categories (P>0.05), but significant differences were observed among vegetables from different areas (P<0.05). The health risks posed by the 16 kinds of rare earth elements varied among different population groups, with adult males and females exhibiting higher risks than children. The daily intake of rare earth elements through vegetable consumption was 0.0025 mg/(kg d), which was below the reference value of 0.07 mg/(kg d). Conclusion The content of rare earth elements in commercial vegetables in Gansu Province is low. The intake of rare earth elements through vegetables by residents will not pose a risk to human health.
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| 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 |
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