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目的了解济南市膳食蔬菜中不同形态砷的污染状况及评价其对居民的健康风险。方法利用液相色谱-原子荧光光谱法(LC-AFS)测定冬季常见蔬菜中的不同形态砷,并对居民通过蔬菜途径所致总砷和无机砷的暴露量进行评估。结果共检测蔬菜样品120份,总砷检出率为42.50%,平均含量为0.0079 mg/kg,其中藕的检出率和含量最高,分别为95.00%和0.029 mg/kg。本方法能够准确测定蔬菜中As(Ⅲ)、As(Ⅴ)、MMA和DMA 4种组分含量,在2份藕样品中检出As(Ⅲ),检出率为1.67%。居民经食用蔬菜所致总砷和无机砷暴露量分别为2.84×10~(-5)mg/(kg·d)和2.04×10~(-5)mg/(kg·d),占每日可耐受摄入量(TDI)比例分别为1.33%和0.95%;其中藕的总砷和无机砷暴露量最高,分别为10.54×10~(-5)mg/(kg·d)和3.96×10~(-5)mg/(kg·d),占TDI的比例为4.92%和1.85%。结论济南市蔬菜不存在明显的砷污染情况,居民通过食用蔬菜途径所致总砷和无机砷的暴露量在安全范围内。
Objective To understand the pollution status of different forms of arsenic in diet vegetables in Jinan and to evaluate their health risks to residents. Methods Liquid chromatography-atomic fluorescence spectrometry (LC-AFS) was used to determine the different forms of arsenic in winter vegetables. The exposure of total arsenic and inorganic arsenic to vegetables caused by inhabitants was also evaluated. Results A total of 120 vegetable samples were detected. The total arsenic detection rate was 42.50% with the average content of 0.0079 mg / kg. The detection rate and content of lotus root were the highest, 95.00% and 0.029 mg / kg, respectively. The method can accurately determine the contents of As (Ⅲ), As (Ⅴ), MMA and DMA in vegetables, and detect As (Ⅲ) in 2 lotus root samples with the detection rate of 1.67%. The total arsenic and inorganic arsenic exposure caused by eating vegetables was 2.84 × 10 -5 mg / (kg · d) and 2.04 × 10 -5 mg / (kg · d) The tolerable intake (TDI) ratio was 1.33% and 0.95%, respectively. Among them, the total arsenic and inorganic arsenic in lotus root were the highest, which were 10.54 × 10 -5 mg / (kg · d) and 3.96 × 10 ~ (-5) mg / (kg · d), accounting for 4.92% and 1.85% of TDI. Conclusion There is no significant arsenic pollution in vegetables in Jinan City. Residents’ exposure to total arsenic and inorganic arsenic caused by eating vegetables is within safe limits.