Abstract − Analytical Sciences, 22(1), 21 (2006).
Fluorescence Determination of the Pesticide Asulam by Flow Injection Analysis
I. SÚBOVÁ,* A. KHENLAMI ASSANDAS,* M. CATALÁ ICARDO,** and J. MARTÍNEZ CALATAYUD*
*Department of Analytical Chemistry, Universidad de Valencia, Valencia, Spain
**Department of Chemistry, Polytechnic University of Valencia, Valencia, Spain
**Department of Chemistry, Polytechnic University of Valencia, Valencia, Spain
This paper presents the analytical determination of the pesticide Asulam based on its native fluorescence. The method was optimized in either a flow injection analysis (FIA) assembly or in batch. The maximum fluorescence intensity was observed for basic pH solutions and at a λex of 258 nm and a λem of 342 nm. The influence of different empirical parameters, such as the pH, the presence of surfactants, solvent polarity or solved oxygen amount, was studied. The calibration range was fitted with a linear equation from 0.01 - 3 mg l-1 Asulam and 0.005 - 15 mg l-1 Asulam for batch and continuous-flow, respectively. The RSD for both procedures was 1.0%. After testing the influence of a large series of potential interferents, the method was applied to water samples from different locations.
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