Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5139218 | Microchemical Journal | 2017 | 26 Pages |
Abstract
A new method for pre-concentration/separation and determination of 2,4-dichlorophenoxyacetic acid (2,4-D) by solid-surface fluorescence (SSF) is proposed. The herbicide was complexed with Rhodamine B at pH 7.0 in the presence of phosphate buffer and anionic surfactant admicelles. A Nylon membrane was selected as a solid support for SSF measurement and the presence of 2,4-D was evident by the RhB quenching effect. Under optimal experimental conditions, the limit of detection and quantification were 6.93 and 21 ng Lâ 1, respectively, and the linear range was obtained from 0.021 to 22.11 μg Lâ 1 2,4-D concentration. The developed methodology showed good sensitivity and adequate selectivity, and it was applied to the 2,4-D determination in seed samples. The SSF represents a simple and fast alternative to conventional methods of analysis, employing an existing instrument in most laboratories.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Magdalena Alesso, MarÃa Carolina Talio, Liliana P. Fernández,