乌鲁木齐十种市售蔬菜微量元素测定与分析

采用电感耦合等离子体质谱(ICP-MS)法分析测定了新疆乌鲁木齐市秋季市售蔬菜中的Pb、Cd、Cu等10种微量元素.结果表明:10种蔬菜中含有人体所需的有益微量元素钙(Ca)、镁(Mg)、锌(Zn)、铁(Fe)、铜(Cu)、镍(Ni)、锰(Mn)、铬(Cr);在调查的4种重金属微量元素铅(Pb)、镉(Cd)、铬(Cr)、铜(Cu)中,元素的检出率均为100%,其中,油麦菜、油白菜和紫包菜的铅元素含量超标,超标率分别为2.66、2.75和0.03;生菜、菠菜、油麦菜、油白菜和大白菜的镉元素含量超标,超标率达到了5.20、4.70、1.52、2.49和0.6;铬元素在10种蔬菜中全部超标,平均含量为1.38 mg/kg,平均超标率为1.76;虽然铜元素的检出率为100%,但无一例超出国家标准限值,在蔬菜的安全食用范围之内.

Determination of Ten Kind of Trace Elements of Vegetables in Urumqi Autumn Market

This article determined the content of ten kind trace elements of vegetables in Xinjiang Urumqi autumn market by inductive coupling plasma mass spectrometry(ICP-MS),the trace elements include Pb,Cd,Cu and so on.The result indicated that,all kinds of vegetables include the beneficial trace element,such as calcium(Ca),magnesium(Mg),zinc(Zn),iron(Fe),copper(Cu),nickel(Ni),manganese(Mn),chromium(Cr) which are the human body needs;Within the investigated four kind of heavy metals trace elements lead(Pb),cadmium(Cd),chromium(Cr),copper(Cu),the element detection rate is 100%,the content of lead exceeds the allowed value in lettuce,Chinese cabbage and red cabbage,the overlimited rate respectively is 2.66,2.75 and 0.03 in three vegetables;.The content of cadmium exceeds the allowed value in Celery lettuce,Spinach lettuce,Chinese cabbage and Peking cabbage,and the overlimited rate has achieved 5.20,4.70,1.52,2.49 and 0.6;The element chromium completely exceeds the allowed value in ten kind of vegetables,the average content is 1.38 mg/kg,the equally overlimited rate is 1.76;Although the detection rate of copper is 100%,but none surpass the national standard,all are in security edible scope.