基于同步-导数荧光光谱法的多组分农药残留测定的研究

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Abstract In the multicomponent fluorescence measurement of pesticide residual, the comparability of construction and chemical property among the components leads to the overlap of the fluorescence spectra, so it′s very difficult to do simultaneous measurment with conventional fluorescent spectroscopy. Using synchronous-derivative fluorimetry, the fluorescence spectra of carbaryl and carbofuran and the effect of different pH on the pesticides were studied. with pH 7.8, and Δλ=60 nm, synchronous fluorescence scan of the mixed solution in the wavelength range of 250-450 nm, was carried out, and transformed to first order derivative fluorescence spectrum. The experiment results indicate that their synchronous-derivative fluorescence spectra were separated absolutely, eliminating the disturbance between them;the fixed solution can be measured simultaneity. For carbaryl and carbofuran, the linear range is 0.013-1.156 μg·mL^-1 and 0.025-1.042 μg·mL^-1, the detection limit is 0.013 μg·mL^-1 and 0.025 μg·mL^-1, and the average recovery is 98%-104% and 96%-103%, respectively. The relative standard deviations (RSDs) of them are all under 2.25%.

Key words：Fluorescence analysis;Synchronous-derivative fluorescence spectrum;Multicomponent measurement;Pesticide residual

Received: 2005-10-16 Accepted: 2006-01-15

ZTFLH:	O657.3
	X839.2

Corresponding Authors: WANG Yu-tian

Cite this article:

WANG Yu-tian,CUI Li-chao,WANG Dong-sheng, et al. Study on the Determination of Multicomponent Pesticide Residual Based on Synchronous-Derivative Fluorimetry [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(11): 2085-2088.

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https://www.gpxygpfx.com/EN/Y2006/V26/I11/2085