五味子中金属元素分析及膳食风险评估

Analysis of metallic elements in Schisandra chinensis and assessment of dietary risk

中文关键词:  五味子  微波消解  电感耦合等离子体质谱法  膳食风险评估

英文关键词:Schisandra chinensis  microwave digestion  inductively coupled plasma mass spectrometry  health risk assessment

中文摘要:

      目的 建立微波消解-电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry, ICP-MS)测定五味子中16种金属元素含量的分析方法, 对检出的有害元素进行膳食风险评估。方法 采用微波消解法处理样品, 120 ℃赶酸至1 mL左右后, ICP-MS法测定五味子样品中16种元素含量。测定结果采用Minitab 15软件进行元素相关性分析, 并结合可耐受最高摄入量(tolerable upper intake level, UL)和目标危害系数/总目标危害系数(target hazard quotient/total target hazard quotient, THQ/TTHQ)法对五味子中有害元素进行膳食风险评估。结果 五味子中含有多种金属元素, Mn、Zn元素含量较高。Mn、Cu、Zn、Se、Mo元素摄入量与UL比值小于1, Cu、As、Cd、Cr的THQ小于1, 表明食用五味子无健康风险。结论 五味子中重金属污染水平整体较低, 只有Cr元素膳食风险计算值相对Cu、As、Cd膳食风险计算值较高, 但不足以对人体健康造成影响。

英文摘要:

      Objective To establish a method for the determination of 16 kinds of metallic elements in Schisandra chinensis by microwave digestion coupled with inductively coupled plasma mass spectrometry (ICP-MS) and evaluate the dietary risk for hazardous elements. Methods The samples were treated with microwave digestion method, after the acid was driven to about 1 mL at 120 ℃, the content of 16 kinds of elements in Schisandra chinensis samples were determined by ICP-MS. The results were analyzed by elemental correlation using Minitab 15 software, and dietary risk assessment of hazardous elements in Schisandra chinensis was conducted by combining the tolerable upper intake level (UL) and target hazard quotient/total target hazard quotient (THQ/TTHQ) methods. Results Schisandra chinensis contained a variety of metal elements, with the content of Mn and Zn being the higher. The ratios of that intake of Mn, Cu, Zn, Se, and Mo to UL were less than 1, and the THQ of Cu, As, Cd, and Cr were less than 1, indicated that the edible Schisandra chinensis had no health risk. Conclusion The pollution level of heavy metals in Schisandra chinensis is generally low, only the calculated dietary risk of Cr element is higher than that of Cu, As and Cd, but it is not enough to affect human health.