食品科学 ›› 2008, Vol. 29 ›› Issue (7): 386-388.

• 分析检测 • 上一篇    下一篇

ICP-MS测定水稻中的铊等重金属及铊污染水稻安全评价

姚焱,陈永亨,王春霖,齐剑英,张平,王许诺   

  1. 广州大学生命科学学院; 中国科学院广州地球化学研究所; 广州大学生命科学学院 广东广州510006; 广东广州510006; 广东广州510640
  • 出版日期:2008-07-15 发布日期:2011-07-28

Determination of Thallium and Other Heavy Metals in Rice by ICP-MS and Assessment on Rice Safety by Thallium Contamination

YAO  Yan, CHEN  Yong-Heng, WANG  Chun-Lin, QI  Jian-Ying, ZHANG  Ping, WANG  Xu-Nuo   

  1. 1.School of Life Science, Guangzhou University, Guangzhou 510006, China; 2.Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou 510640, China
  • Online:2008-07-15 Published:2011-07-28

摘要: 采用ICP-MS测定水稻中包括铊在内的多种重金属元素,同时对铊污染水稻进行了安全评价。对ICP-MS的工作条件及影响测定的因素进行了探讨,铊元素的检出限为0.006μg/L,其他各元素为0.008~0.3μg/L,Tl、Co、Ni、Cu、Mo、Cd、Pb等的加标回收率为94.2%~103.7%。对铊在水稻中的分布以及土壤铊污染对水稻吸收其他重金属元素的影响进行了分析。结果表明,铊在茎叶中的含量显著高于种子;铊对水稻茎叶吸收重金属有一定的促进作用,而对水稻种子吸收重金属却有抑制作用。

关键词: ICP-MS, 水稻, 铊, 重金属

Abstract: A method was founded for determination of thallium and other heavy metal elements in rice by inductively coupled plasma mass spectrometry (ICP-MS), and the safety of rice contaminated by thallium was evaluated. The working condition for ICP-MS and the interference effects of method were investigated. Under the optimum experimental conditions, the detection limit of thallium is 0.006μg/L, and for other elements their detction limits are in range of 0.008~0.30μg/L. The spiked recoveries for Tl, Co, Ni, Cu, Mo, Cd, and Pb are between 94.2% and 103.7%. Using this method,the distribution of thallium and the absorption of many other heavy metal elements in rice growing in thallium contaminated soil were analyzed. The results showed that thallium content in the stem and leaf is higher than that in the seed. Thallium can stimulate the stem and leaf of rice to absorb some other heavy metals, but restrain the rice seed to do so.

Key words: ICP-MS, rice (Oryza sativa), thallium, heavy metal