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To investigate the level of cadmium in food sold in Nanshan District of Shenzhen, and to evaluate its exposure risk based on the dietary intake of residents in Shenzhen.
Using stratified random sampling method, 810 food samples sold in Nanshan district of Shenzhen city were collected from 2018 to 2022. The content of cadmium in the samples was determined by inductively coupled plasma mass spectrometry (ICP-MS), and the test results were evaluated according to GB2762-2022 “Food Safety National Standard for Contaminants in Food”. Based on the residents’ dietary intake, point assessment, margin of safety (MOS), and chemical carcinogen risk model were used to evaluate the exposure risk of cadmium to residents’ health.
The average content of cadmium in 810 food samples was 0.325 mg/kg, the detection rate was 44.44% (360/810), and the over-standard rate was 6.17% (50/810). The average monthly dietary exposure of cadmium was 17.731 μg/(kg·BW), MOS > 1, Rc was 4.030 × 10-5 per year, and the monthly high-end dietary exposure of cadmium was 38.536 μg/(kg·BW), MOS < 1, Rc was 8.740 × 10-5 per year, suggesting that there was carcinogenesis risk through daily dietary intake.
There is cadmium contamination in food sold in Nanshan district of Shenzhen city. The health risk of residents exposed to cadmium through daily diet is low, but there is a health risk among people exposed to high-end diet. The relevant departments should strengthen the supervision of food sold in the market, especially rice and rice products, aquatic products, and vegetables, so as to control the health risk of dietary exposure to cadmium.
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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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