激光诱导击穿光谱对污染鱼体内重金属元素分布与含量的分析

Analysis of Distribution and Contents of Heavy Metal Pollution in Fish Body with Laser-Induced Breaddown Spectroscopy

环境污染可造成生物体的中毒、病变及死亡。生物体各组织对污染物质的吸收、积累情况是不同的。生物体各组织对污染物质重金属元素的吸收是生物医学中的一项重要研究。采用激光诱导击穿光谱(LIBS)方法对受污染的鱼体各组织进行了重金属元素定量分析。实验中得到了一组探测鱼类组织元素成份的LIBS最佳条件,拟合了Pb和Ba元素的定标曲线并通过外标法测定了重金属含量。实验结果表明,鱼体中肝脏及口腮等部位有重金属积累,而在鱼肉中重金属含量极低。所提出的方法可用于生物体受污染影响的评估研究,在生物医学领域有重要推广价值。

Environmental pollution can cause poisoning,disease and death of organisms,and the absorption and the accumulation of different biological tissues on pollutants are different.The absorption of heavy metal elements of various biological tissues on pollutants is an important biomedical research problem.In the present paper,a laser induced breakdown spectroscopy（LIBS） method was used to quantitatively analyze heavy metal elements in various tissues of some contaminated fish samples.Optimal experimental parameters were obtained in the LIBS experiments for these fish samples,calibration curves for plumbum and barium elements were fitted and the contents of heavy metal elements were determined with the external calibration approach.Experimental results showed that there was the heavy metal accumulation in fish liver mouth,and gills etc,however the heavy metal content in fish meat is very low.The proposed method can be used for the assessment studies of the influence of pollution on the organisms,and can be promoted in the biomedical fields.