Article ID Journal Published Year Pages File Type
7644053 Microchemical Journal 2013 8 Pages PDF
Abstract
The photo-induced fluorescence (PIF) spectral properties of propanil, a contact anilide herbicide were investigated. In the PIF approach, non-fluorescent propanil was transformed by UV irradiation into strongly fluorescent photo-product(s). The effect of solvents, including water, methanol, methanol-water binary mixtures and cyclohexane, on the propanil PIF properties was studied, and several PIF parameters (irradiation time, excitation and emission wavelengths, medium) were optimized. As a result, the analytical usefulness of a simple, sensitive and precise PIF analytical method was demonstrated for the determination of propanil. The best PIF analytical performances were obtained in an 80/20% v:v methanol/water mixture, with a wide linear dynamic range (LDR) of nearly three orders of magnitude, low limit of detection (LOD) and limit of quantification (LOQ) values of, respectively, 1.3 and 4.7 ng mL −1, and a small relative standard deviation (RSD) of 1.3%. The optimized PIF method was applied to the estimation of propanil residues in various spiked natural water samples, collected in the Senegal River valley, with satisfactory recovery percentage values (97-117%). An interference study of several foreign species, including pesticides and inorganic ions, likely to be present in the Senegal natural waters, was also performed.
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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