ICP-AES检测河北省食管癌高发区小麦和玉米中8种微量元素

目的：检测河北省食管癌高发区居民食用小麦和玉米中微量元素含量，并探讨其与食管癌的可能关系。方法：深入食管癌高发区现场按发病率分组随机选取当地居民正在食用的小麦样品59份和玉米样品57份，利用电感耦合等离子体原子发射光谱法（ICP-AES）测定小麦和玉米中镉、铜、锰、铁、锌、铝、铅及砷8种微量元素含量。结果：8种微量元素在小麦和玉米中的加标回收率分别为97．24％～120．52％和80．32％～107．7％；标准偏差分别为1．63％～4．43％和1．11％～3．76％。食管癌高发区小麦和玉米中铜和锌的含量低于低发区。结论：食管癌高发区主粮中低锌、镉、铜、砷，高锰。

Determination of trace - elements in household wheat and corn from the high incidence area of esophageal cancer in Hebei Province by ICP-AES

Objective:To detect 8 trace elements in edible wheat and corn for local residents from the high incidence area of esophageal cancer in Hebei province and probe into the relation between element contents and esophageal cancer.Methods:The method of ICP-AES with HNO3-HClO4 digestion was applied to analysis of 8 trace elements including Cd,Cu,Fe,Mn,Zn,Al,Pb and As in 59 wheat samples and 57 corn samples which were chosen at random in the high incidence area.Rusults:The average recovery of 8 trace elements for wheat sample was 97.24%~120.52%(n=5)and the RSD was 1.63%~4.43%.Except for Fe element,the average recovery of 8 trace elements for wheat sample was 80.32%~107.7%.The RSD(n=5) was 1.11%~3.76%.The contents of Cu and Zn in wheat and corn from the high incidence area of esophageal cancer were lower than those from the low incidence area.Conclusion:There are low contents of Zn,Cd,Cu and As and a high content of Mn in wheat and corn in the high incidence area of esophageal of Hebei Province.