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目的了解深圳市居民膳食中铅、镉暴露的摄入量,评估深圳市居民膳食铅、镉暴露风险。方法对深圳市市售食品中铅、镉含量进行监测,结合居民膳食摄入量调查结果,应用FAO/WHO推荐的食品中化学污染物膳食暴露评估方法,比照铅、镉的暂定每周耐受摄入量((Provisional tolerated Monthly intake,PTWI),对居民膳食中铅、镉暴露水平进行评估。结果深圳市居民平均每周膳食中铅暴露量为0.003 4 mg/kg BW,占PTWI的13.60%;镉暴露量为0.013 3 mg/kg BW,占PTWI的190.00%。铅、镉贡献率较大的食品均是水产品及其制品、米及其制品。结论深圳市居民膳食中铅暴露水平低于PTWI,镉暴露水平高于PTWI。深圳市居民水产品及其制品、米及其制品的消费量大,对居民膳食铅、镉贡献率较高,仍有必要减少膳食中铅、镉的摄入,尤其是镉的膳食摄入量。
Objective To understand the dietary intake of lead and cadmium in Shenzhen residents and evaluate the dietary exposure of lead and cadmium to Shenzhen residents. Methods The contents of lead and cadmium in foodstuffs in Shenzhen were monitored. Based on the results of the survey on dietary intake of residents, the method of dietary exposure assessment of chemical contaminants in foods recommended by FAO / WHO was used to compare the tentative weekly resistance of lead and cadmium (Provisional tolerated monthly intake, PTWI), the residents of the dietary lead and cadmium exposure levels were assessed.Results The average weekly dietary exposure of lead in Shenzhen was 0.003 4 mg / kg BW, accounting for 13.60 PTWI %; Cd exposure was 0.013 3 mg / kg BW, accounting for 190.00% of PTWI. The products with the largest contribution of lead and cadmium were all aquatic products and their products, rice and their products.Conclusion The dietary exposure of lead Below PTWI, the exposure level of cadmium is higher than that of PTWI. Consumption of Shenzhen residents’ aquatic products and their products, rice and their products is large, and their contributions to the dietary lead and cadmium are high. There is still a need to reduce the contents of lead and cadmium in the diet Ingestion, especially for dietary intake of cadmium.