微波消解—原子吸收法测定广东阳春砂中的4种微量元素

Determination of four microelements in Fructus amomi by microwave digestion-AAS method

目的：建立广东阳春砂中4种微量元素的定量检测方法,并对其含量水平和健康风险进行初步评价。方法：采用微波消解—原子吸收光谱法定量分析6个广东产阳春砂中铅、锌、铜、铬等4种微量元素的含量。结果：6个广东产阳春砂样品中,铜的含量最高,超出国家限量标准（Cu≤20.0 mg/kg）;锌含量次之,在6.5~13.2 mg/kg之间,铅和铬的含量均低于3.8 mg/kg,符合国家限量标准。结论：从微量元素含量水平来看,广东阳春砂种植基地土壤中微量元素缺乏,应该加强微肥施种的力度。阳春砂中高浓度的铜元素则从侧面反映了广东阳春砂种植基地土壤存在污染的可能性,应当引起足够重视。从人体服用后的健康风险指数来看,铅和铬对人体产生健康风险的可能性较小,铜对人体可能会产生一定的健康风险。

Objective： To establish the method for determination of four microelements in fructus amomi of Guangdong province,and discuss it＇s concentration and health risk assessment.Methods： Four microelements in fructus amomi of Guangdong province were measured by microwave digestion-atomic absorption spectrometry method.Results： The concentrations of Cu in six fructus amomi samples were the most abundant elements,and all beyond national standard.The concentrations of Zn were in the range of 6.5～13.2 mg/kg,little higher than the concentrations of Pb and Cr（3.8 mg/kg）,and all low national standard.Conclusion： The concentrations of microelements shows that microelements in the soil from fructus amomi planting bases in Guangdong province were lack and there were also exist pollution of Cu in soil.The Risk Index showed that the concentrations of Cu in fructus amomi will possibly produce health risk to adult person.We should pay much attention to this situation.