| 光谱学与光谱分析 |
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| Effect of Methanol-Water Mixture on Three-Dimensional Fluorescence Spectra of Carbaryl |
| XIAO Xue1，ZHAO Nan-jing1*，YU Shao-hui2，MA Ming-jun1，YANG Rui-fang1，YIN Gao-fang1，DUAN Jing-bo1， FANG Li1，ZHANG Yu-jun1，LIU Wen-qing1 |
1. Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
2. School of Mathematics and Statistics, Hefei Normal University, Hefei 230061, China |
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Abstract Extensive use of pesticides has a significant impact on the environment. Carbaryl, whose residues stay in the surface water, is one of the most widely used broad spectrum insecticides in agriculture. It is important to understand carbaryl spectral characteristics and detection methods. The characteristic of excitation-emission three-dimensional spectra of carbaryl is studied. By changing the concentration of methanol in methanol-water binary solvent, the impact of methanol-water mixture on three-dimensional fluorescence spectra of carbaryl is discussed. The results show that the characteristic excitation-emission spectra of carbaryl is single peak, the range of the excitation wavelength and emission wavelength are: 244~304 and 300~350 nm respectively, the maximum excitation/emission peak located at 280 and 335 nm. With increasing the content of methanol in methanol-water binary solvent mixture, there is no obviously spectra shift of three dimensional fluorescence spectra of carbaryl. However, the intensity of fluorescence is nonlinear dependent on the content of methanol, mainly due to the specific properties of binary mixed solvent.
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Received: 2015-02-09
Accepted: 2015-05-20
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Corresponding Authors:
ZHAO Nan-jing
E-mail: njzhao@aiofm.ac.cn
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