摘要
目的研究水产生物稀土元素的组成特征、分布模式及对生态环境的意义。方法在厦门市主要水产市场采集水产生物样品5类65份,采用微波消解-电感耦合等离子体质谱法(ICP-MS)测定15种稀土元素,选择国家一级标准物质茶叶(GBW10016)进行质量控制。结果水产生物稀土元素总量变化大致为淡水鱼<海水鱼<腹足类软体动物<甲壳类节肢动物<双壳类软体动物,组成特征以轻稀土元素为主,La和Ce的含量最高,轻稀土之间的相关性较差,轻稀土、重稀土之间存在着明显的分馏作用。结论经球粒陨石标准化处理后,水产生物的稀土分布模式与中国黄土、东海大陆架玄武岩和南海北部路坡海洋沉积物的REE分布模式基本相似。水产生物对REE的富集由其种类、自身生活习惯的特点和环境决定,REE富集能力强的花蛤、牡蛎对区域生态环境有很好的指示作用。
Objective To investigate the composition characteristics and distribution pattern of rare earth elements in aquatic organisms as well as their environmental significance. Methods A total of 65 aquatic organisms samples in five varieties were collected from Xiamen aquatic product markets. 15 rare earth elements were determined by inductively coupled plasma- mass spectrometry（ ICP- MS）. The national standard material in class GBW10016（ tea- leaf） was selected for quality control. Results The ranking by average contents of rare earth elements in aquatic organisms were freshwater fish marine fish gastropods molluscs crustacean arthropod bivalve mollusks. Composition characteristics showed that light rare earth elements was the dominant,the contents of Ce and La were the highest,and the correlation among light rare earth was poor. There was large fractionation between LREEs and HREEs. Conclusion After the chondrite- nomalized distribution treatment,it is found that the distribution patterns of rare earth elements in aquatic organisms are similar to those of the Chinese loess,the East China Sea continental shelf basalts and the REE of the marine sediments from the northern slope of the South China Sea. The enrichment of REEs in aquatic organisms is determined by the characteristics of the their species,living habits and environment. Clam,and oyster are suggested here as bio- marker for REE regional ecological environment due to their high potential of REE enrichment.
出处
《中国卫生检验杂志》
CAS
2016年第18期2592-2595,共4页
Chinese Journal of Health Laboratory Technology
基金
福建省卫生厅青年科研课题资助(2015-2-56)
关键词
稀土元素
水产生物
生态化学特征
电感耦合等离子体质谱法
Rare earth element
Aquatic organisms
Characteristics of ecological chemistry
Inductively coupled plasma mass spectrometry
