| 光谱学与光谱分析 |
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| The Functional Mechanism between the Pesticide Pyrimorph and Humic Acid |
| HUANG Jin-li,XIAO Yu-mei,LIU Ji-ping, FU Bin,WU Yan-hua,REN Wen-hua,LI Nan*,QIN Zhao-hai* |
| Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100094, China |
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Abstract In the present experiment, we mainly discussed the function mechanism between the humic acid and a new kind of fungicide Pyrimorph，aiming to play a positive role in the reduction of contamination caused by pesticides on environment.After the disposition step by step, the humic acid was separated into three parts.Then IR and fluorescence analytical methods were employed to explain the functional mechanism between the pesticide and each part of humic acid.As a result, there are extensive interactions between the three parts of the humic acid and the fungicide Pyrimorph.The interactions between fulvic acid and Pyrimorph are mainly the H-bond and the transfer of the electric charge caused by the C=O of the Pyrimorph and the —OH of the fulvic acid, and the interaction between matomeilon and Pyrimorph is mainly the transfer of the electric charge, and the interaction between humin and Pyrimorph is the weakest.It was showed that the fulvic acid is the most active part in the humic acid.That’s to say the intensity of the interaction between the three parts of the humic acid and the fungicide Pyrimorph is smaller and smaller with the order of molecular weight from small to big, namely fulvic acid, matomeilon acid and humin.
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Received: 2007-01-06
Accepted: 2007-04-08
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Corresponding Authors:
LI Nan
E-mail: linan@cau.edu.cn
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