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中国农学通报

中国农学通报 ›› 2025, Vol. 41 ›› Issue (32): 30-35.doi: 10.11924/j.issn.1000-6850.casb2025-0049

• 林学·园艺·园林 • 上一篇    下一篇

直接测汞法探索汞在水稻植株不同组织部位的分布特征

卢克贵1(), 邢怡晨1, 王畅2, 陈晓萍3, 刁春霞1()   

  1. 1 泰州市疾病预防控制中心，江苏泰州 225300
    2 姜堰区疾病预防控制中心，江苏泰州 225500
    3 兴化市疾病预防控制中心，江苏兴化 225700
  • 收稿日期:2025-01-21 修回日期:2025-03-15 出版日期:2025-11-18 发布日期:2025-11-18
  • 通讯作者:
    刁春霞，女，1974年出生，江苏泰州人，主任技师，学士，主要从事食品中有害成分分析方面的工作。通信地址：225300 江苏泰州海陵区永泰路318号 泰州市疾病预防控制中心，E-mail：。
  • 作者简介:

    卢克贵，男，1994年出生，贵州贵阳人，技师，硕士，研究方向：食品安全检测。通信地址：225300 江苏泰州海陵区永泰路318号 泰州市疾病预防控制中心，E-mail：。

Exploring Distribution Characteristics of Mercury in Different Tissues of Rice Plants by Direct Mercury Measurement Method

LU Kegui1(), XING Yichen1, WANG Chang2, CHEN Xiaoping3, DIAO Chunxia1()   

  1. 1 Taizhou Center for Disease Control and Prevention, Taizhou, Jiangsu 225300
    2 Jiangyan District Center for Disease Control and Prevention, Taizhou, Jiangsu 225500
    3 Xinghua City Center for Disease Control and Prevention, Xinghua, Jiangsu 225700
  • Received:2025-01-21 Revised:2025-03-15 Published:2025-11-18 Online:2025-11-18

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摘要： 本研究旨在建立高效快速的水稻汞（Hg）含量直接测定方法，并探究Hg在水稻根、茎、稻壳、稻米4个组织部位的分布特征。以同一水稻植株的根、茎、谷为试材，干燥粉碎后采用直接测Hg法测定含量，使用外标法定量。结果表明：直接测Hg法线性关系良好（相关系数R=0.9999），检出限为0.064 µg/kg，精密度为1.8%~3.2%，样品加标回收率为103%~109%；Hg在水稻不同组织部位中的含量差异显著，整体分布趋势为稻根>稻茎>稻壳>稻米，呈现“根—茎—谷”的三段式分布；土壤与水稻茎、稻壳、稻米组织间Hg含量存在正相关性（相关系数为0.329~0.693）。本研究建立的直接测Hg法能避免复杂的样品前处理过程，且操作简单、快速准确，适用于水稻中Hg元素的检测。水稻不同组织部位Hg元素分布差异明显，针对Hg污染区域，可通过调控土壤Hg活性（如施加改良剂）、筛选低富集品种等方式，降低稻米Hg累积风险。以指导粮食生产和环境治理。

关键词: 直接测汞法, 水稻, 不同组织部位, Hg元素, 分布特征, 富集能力

Abstract:

The objective of this study is to establish an efficient and rapid method for directly measuring mercury (Hg) content in rice and to investigate the distribution characteristics of Hg in four different tissue parts of rice plants. Roots, stems, and grains (including husk and brown rice) from the same rice plants were used as test materials. After drying and pulverizing, Hg was determined by direct mercury analyzer with external standard quantification. The results showed that the direct mercury analysis method exhibited excellent linearity (correlation coefficient R=0.9999), with a detection limit of 0.064 μg/kg, precision ranging from 1.8% to 3.2%, and spike recovery rates between 103% and 109%; significant differences in Hg content were observed among different rice tissues, with an overall distribution pattern of root > stem > husk > brown rice, forming a three-stage distribution pattern of "root-stem-grain"; positive correlations were found between Hg content in soil and various rice tissues (correlation coefficients ranging from 0.329 to 0.693). The established direct mercury analyzer method eliminates complex sample pretreatment processes while maintaining simplicity, rapidity, and accuracy, making it suitable for Hg detection in rice. The distribution of Hg in different tissues of rice is significantly different. For Hg-contaminated areas, the risk of Hg accumulation in rice can be reduced by regulating soil Hg activity (such as applying modifiers) and screening low-enrichment varieties, so as to guide grain production and environmental governance.

Key words: direct mercury analyzer method, rice, different tissue parts, mercury element, distribution characteristics, enrichment capacity