市售动物肉类中铜元素的分析和评价
通过本实验对镉、铜、锌、铅、硒5种重金属在市售动物肉中的含量进行测定，初步探讨了21种肉类样品中5种重金属元素的含量高低，为人们合理膳食、根据自身微量元素缺乏情况合理选用肉类作为一项补充来源提供科学依据实验理论数据和参考。4421
关键词: 重金属；肉类；原子吸收
Analysis and evaluation on the Content of Cuprum in meats
Abstract:In this experiment，21 meats samples are used to test the content of Cadmium, Cuprum，Zinc，Lead, Selenium by using the microwave digestion and Zeeman graphite furnace atomic absorption spectrometry. Conditions of microwadigestion :the temperature is 100℃、120℃and140℃，pressure are 10atm、15atm and 20atm ，power 800w.The coefficient(R2) of the liner correlation was greater than 0.9，it is a good liner correlation .The result shows that the content of Zn and Se is higher，Cu and Pb is lower.In all samples ，the hightest content of Cu is qingzhen brand beef ，the content is 0.62µg/kg.The lowest is aisen brand ham，the content of Cu is 0.067µg/kg.All samples heavy metals content is lower than the content which worked out by China.
By means of the experiment, which determination of the content of heavy metal elements (Cadmium, Cuprum，Zinc, Lead, Selenium) in meats, the paper has preliminary studied the content of the 5 heavy elements in meats, and provided new data and references for people to make reasonable selection of choose the balance diet and the right meats for supple the elements which the body is lack.
Key words:heavy metals；meats； atomic absorption
目录
1引言 1
1.2 肉类食品中的污染物 1
1.2.1 兽药 1
1.2.2 多环芳烃 1
1.2.3 真菌毒素 1
1.2.4 农药 1
1.2.5 重金属 2
1.3 重金属过量的危害 2
1.3.1 铜元素 2
1.3.2 锌元素 2
1.3.3 铅元素 3
1.3.4 硒元素 3
1.4 国内外测定重金属的方法 3
1.4.1 原子荧光光度法 3
1.4.2 电感耦合等离子体质谱法 3
1.4.3 电感耦合等离子发射光谱法 4
1.4.4 高效液相色谱法 4
1.4.5 酶分析法 4
1.5 测定Cu元素的方法 4
1.5.1样品预处理 4
1.5.2 标准溶液配制 5
1.5.3 测定条件 5
1.6我国几种肉中含金属的情况 6
1.7本课题研究的目的与意义 7
2材料与方法 8
2.1实验材料与试剂 8
2.2 主要实验仪器及设备 8
2.3 实验方法 8
2.3.1 样品预处理 8
2.3.2样品消解方法 8
2.3.3肉类中重金属的测定方法与评价 9
3结果与分析 11
3.1肉类中重金属含量检测方法与评价 11