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- W2123581762 abstract "In this paper a sensitive and simple method for the resolution of mixtures of chlorophenoxyacid herbicides using photochemical derivatization induced fluorescence has been described. These compounds do not show any fluorescence, hence photolysed to induce fluorescence after direct irradiation with ultraviolet light in presence of a cationic surfactant (cetyltrimethylammonium chloride). Critical variables such as the surfactant concentration and the irradiation time have been optimised for each compound using Sequential Response Surface Methodology (SRSM) by applying Doehlert designs in order to obtain maximum fluorescence intensity. The difference shown between the optimised irradiation times for the formation of the photoproducts allowed us to propose a time-resolved photoactivation method, for the simultaneous determination of binary mixtures, based on the use of different linear calibration curves established at various irradiation times depending on the mixture to be resolved. Satisfactory recoveries were obtained in the analysis of several mixtures of these herbicides at different ratios in spiked waters." @default.
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- W2123581762 date "2003-06-13" @default.
- W2123581762 modified "2023-10-18" @default.
- W2123581762 title "Simultaneous quantification of chlorophenoxyacid herbicides based on time-resolved photochemical derivatization to induce fluorescence in micellar medium" @default.
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- W2123581762 doi "https://doi.org/10.1016/s0039-9140(03)00109-7" @default.
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