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The interaction between natural organic matter in raw waters and pesticide residues: A three dimensional excitation-emission matrix (3DEEM) fluorescence investigation

机译:原水中天然有机物与农药残留之间的相互作用:三维激发发射矩阵(3DEEM)荧光研究

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摘要

This paper examines the interaction between dissolved natural organic matter and pesticide residues, both of which are found in raw water sources, using three dimensional excitation-emission matrix (3DEEM) fluorescence spectroscopy. It was observed that pesticide residue at 0.1 mg L~(-1) formed a complex with humic-like fluorophores that are commonly found in raw water samples. Applying 3DEEM fluorescence to investigate the humic fractions, it was found that identification of changes in water sources was possible, and, importantly, the presence of a number of pesticides was able to be determined. In addition, the formation of this complex, and the in fluence of soluble cations and anions upon it, was shown to impact the efficiency of analytical extraction procedures for pesticides; however, 3DEEM fluorescence could be an approach to account for such losses.
机译:本文使用三维激发-发射矩阵(3DEEM)荧光光谱技术研究了溶解的天然有机物与农药残留之间的相互作用,这两种农药都存在于原水中。观察到农药残留量为0.1 mg L〜(-1)与原水样品中常见的腐殖质类荧光团形成复合物。应用3DEEM荧光技术研究腐殖质组分,发现可以确定水源的变化,而且重要的是,能够确定多种农药的存在。此外,已证明这种络合物的形成以及可溶性阳离子和阴离子对其的影响会影响农药分析提取程序的效率。但是,3DEEM荧光可能是解决此类损失的一种方法。

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