土壤理化性质对草甘膦残留检测的影响

doi:10.11934/j.issn.1673-4831.2017.09.013

生态与农村环境学报 ›› 2017, Vol. 33 ›› Issue (9): 860-864.doi: 10.11934/j.issn.1673-4831.2017.09.013

• 研究方法 • 上一篇

土壤理化性质对草甘膦残留检测的影响

孙立思^1,2,3, 王娜^2,3, 孔德洋^2,3, 郭欣妍^2,3, 单正军^2,3, 王瑛¹

1. 南京理工大学化工学院, 江苏南京 210094;
2. 环境保护部南京环境科学研究所, 江苏南京 210042;
3. 国家环境保护农药环境评价与污染控制重点实验室, 江苏南京 210042

收稿日期:2017-02-06 出版日期:2017-09-25 发布日期:2017-09-25
通讯作者: 王娜,E-mail:wangna@nies.org;王瑛,E-mail:wangying701@mail.njust.edu.cn E-mail:wangna@nies.org;wangying701@mail.njust.edu.cn
作者简介:孙立思(1992-),女,山东德州人,硕士生,主要从事农药环境行为特征、生态效应与污染控制研究。E-mail:sunlisi0229@163.com
基金资助:
国家环境保护标准项目（2015-22）

Influence of Soil Physical and Chemical Properties on Detection of Glyphosate Residue.

SUN Li-si^1,2,3, WANG Na^2,3, KONG De-yang^2,3, GUO Xin-yan^2,3, SHAN Zheng-jun^2,3, WANG Yin¹

1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2. Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China;
3. Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Ministry of Environmental Protection, Nanjing 210042, China

Received:2017-02-06 Online:2017-09-25 Published:2017-09-25

摘要/Abstract

摘要：

在土壤环境中草甘膦极易被土壤颗粒吸附，并与土壤中有机质、金属氧化物等反应，对草甘膦的检测造成影响。采用磷酸钠和柠檬酸三钠混合溶液超声提取、正己烷萃取净化、氯甲酸-9-芴基甲酯（FMOC-Cl）衍生化、液相色谱-荧光检测器测定的方法，分别探究了腐殖酸含量、重金属离子含量以及土壤pH值对草甘膦检测方法的影响。结果表明，随着土壤中有机质含量增加，草甘膦的回收率逐渐降低；在土壤pH值为3~11范围内，随着pH值增加，草甘膦的回收率总体呈增加趋势，在pH值为8~9时取得最大值，当pH值>9时回收率又有所降低；土壤中的重金属离子Cu²⁺、Fe²⁺、Fe³⁺、Zn²⁺和Ni²⁺可以与草甘膦形成稳定的络合物，使回收率降低，而重金属离子Co²⁺和Mn²⁺对草甘膦检测没有影响。该研究建立的土壤和沉积物中草甘膦的标准检测方法能够满足各种类型土壤和沉积物的检测要求。

关键词: 草甘膦, 土壤, 理化性质, 检测方法

Abstract:

In the soil environment, glyphosate is apt to get adsorbed to soil particles, and react with organic matter and metal oxides in the soil, which may affect detection of glyphosate. Influences of humic acid content, heavy metal ion content and pH of the soil on detection of glyphosate were explored,using the sodium phosphate and trisodium citrate aqueous supersonic extraction method, hexane purification method, 9-fluorenylmethylchloroformate (FMOC-l) derivatization method and HPLC-FLD. It turned out that recovery rate of glyphosate in soil decreased with increasing organic matter content, increased with increasing soil pH in the range of 3-11 (peaking at pH 8-9 and falling at pH over 9 back to the level at pH 7), decreased with the existence of heavy metal ions, such as Cu²⁺, Fe²⁺, Fe³⁺, Zn²⁺ and Ni²⁺ because they formed complexes with glyphosate, but was not affected by the existence of Co²⁺ and Mn²⁺. All the findings demonstrate that the standard detection method can meet the requirements for detecting glyphosate in various types of soils and sediments.

Key words: glyphosate, soil, physical and chemical properties, detection method

中图分类号:

X592

孙立思, 王娜, 孔德洋, 郭欣妍, 单正军, 王瑛. 土壤理化性质对草甘膦残留检测的影响[J]. 生态与农村环境学报, 2017, 33(9): 860-864.

SUN Li-si, WANG Na, KONG De-yang, GUO Xin-yan, SHAN Zheng-jun, WANG Yin. Influence of Soil Physical and Chemical Properties on Detection of Glyphosate Residue.[J]. Journal of Ecology and Rural Environment, 2017, 33(9): 860-864.

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土壤理化性质对草甘膦残留检测的影响

Influence of Soil Physical and Chemical Properties on Detection of Glyphosate Residue.

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