广西八角中铅、镉、铬含量分析及膳食风险评估

Analysis of lead, cadmium and chromium and dietary risk assessment of Illicium verum in Guangxi

中文关键词:  电感耦合等离子体质谱法  八角  铅  镉  铬  膳食风险评估

英文关键词:inductively coupled plasma mass spectrometry  Illicium verum  lead  cadmium  chromium  dietary risk assessment

中文摘要:

      目的 检测广西八角(Illicium verum)中铅(Pb)、镉(Cd)、铬(Cr) 3种重金属元素含量, 并进行膳食风险评估。方法 利用微波消解仪对样品进行消化处理, 以钪(Sc)、铟(In)、铋(Bi)作为内标元素, 应用电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry, ICP-MS)同时测定样品中的3种重金属元素含量, 采用目标危害系数(target hazard quotient/total target hazard quotient, THQ/TTHQ)法进行膳食风险评估。结果 在各自的线性范围内, Pb、Cd、Cr相关系数均不小于0.9997, 加标回收率在92.5%~101.8%范围内。22批次八角中3种重金属元素的平均含量由高到低依次为Pb (0.230 mg/kg)> Cr (0.130 mg/kg)> Cd (0.0120 mg/kg), 含量范围的离散程度较大, 变异系数由高到低依次为Pb (139.13%)>Cd (91.67%)>Cr (84.62%), 可能与不同八角样品种植土壤中重金属含量不同有关; 22批次八角样品的THQ及TTHQ均小于1。结论 八角样品中Pb含量均低于国家限量标准, 3种重金属元素无明显膳食风险。

英文摘要:

      Objective To detect the content of lead, cadmium and chromium in star anise (Illicium verum) of Guangxi, and evaluate the dietary risk. Methods The samples were digested by microwave digestion instrument, scandium, indium and bismuth were used as internal standard elements, the content of 3 kinds of heavy metals in the samples were determined simultaneously by inductively coupled plasma mass spectrometry (ICP-MS), the dietary risk of 3 kinds of heavy metals were evaluated by target hazard quotient/total target hazard quotient (THQ/TTHQ). Results The correlation coefficients of the 3 kinds of heavy metals were not less than 0.9997 in their respective linear ranges, and the recoveries were in the range of 92.5%-101.8%. The average content of lead, cadmium and chromium in the 22 batches of star anise samples from high to low was lead (0.230 mg/kg)>chromium (0.130 mg/kg)>cadmium (0.0120 mg/kg), the dispersion of the content range was large, and the coefficient of variation from high to low was lead (139.13%)>cadmium (91.67%)>chromium (84.62%), which might be related to the different content of heavy metals in the planting soil of different star anise samples. THQ and TTHQ of 22 batches of star anise samples were less than 1. Conclusion The content of lead in star anise samples are lower than the national limit standard, the 3 kinds of heavy metals in star anise samples have no obvious dietary risk.