Soil thin-layer chromatography and pesticide mobility through soil microstructures. New technical approach.
Soil thin-layer chromatography and pesticide mobility through soil microstructures. New technical approach.
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DOI：
10.1016/s0021-9673(99)01007-9
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发表时间：
1999-12
期刊：
影响因子：
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通讯作者：
P. Ravanel;M. Liégeois;D. Chevallier;M. Tissut
中科院分区：
文献类型：
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作者：
P. Ravanel;M. Liégeois;D. Chevallier;M. Tissut
以水或水-甲醇为溶剂的土壤薄层色谱法可以观察和测量标记农药在土壤微结构中的流动性。11种不同的筛选矩阵进行了研究：纯腐殖酸，纯粘土，片岩和土壤。电离化合物（百草枯，草甘膦）紧紧结合在这些矩阵。其他化合物，亲脂性和一般非离子化的，迁移在大多数研究的矩阵，无论是无机或有机相同的顺序：RFatrazine=异丙隆>敌草隆=氟虫腈>phenmedipham。这个顺序大致与log P相关，但建议更复杂的相关性。水运动的速率，WR，从一个矩阵到另一个变化很大。因此，在降雨作用下，农药在土壤微结构中的移动M可以用方程M=WR RF来描述。
Soil thin-layer chromatography with water or water–methanol as solvents allows observation and measurement of the mobility of labelled pesticides through soil microstructures. Eleven different sieved matrices were studied: pure humine, pure clays, schists and soils. Ionized compounds (paraquat, glyphosate) were tightly bound to these matrices. The other compounds, lipophilic and generally non-ionized ones, migrated in the same order on most of the studied matrices, either mineral or organic: RFatrazine=isoproturon>diuron=fipronil>phenmedipham. This order was roughly correlated to log P but much more complex correlations were suggested. The rate of water movement, WR, widely changed from one matrix to another. Therefore, the pesticide movement, M, in soil microstructures under the action of rain may be described by the equation M=WR RF.