Determination of 1-naphthylacetic acid in commercial formulations and natural waters by solid-phase spectrofluorimetry |
| |
Authors: | Alberto Navalón Rosario Blanc José Luis Vilchez |
| |
Institution: | (1) Research Group of Solid-Phase Spectrometry, Department of Analytical Chemistry, University of Granada, E-18071 Granada, Spain |
| |
Abstract: | A method for the determination of trace amounts of 1-naphthylacetic acid (NAA) has been developed, based on solid-phase spectrofluorimetry. The relative fluorescence intensity of NAA fixed on Sephadex QAE A-25 gel was measured directly after packing the gel beads in a 1-mm silica cell, using a solid-phase attachment. The wavelengths of excitation and emission were 280 and 336 nm, respectively. The applicable concentration range was from 0.3 to 18 ng/ ml, with a relative standard deviation of 1.4% (for a level of 9 ng/ml) and a detection limit of 0.09 ng/ml. The method was applied to the determination of NAA in commercial formulations and natural waters. The method is more sensitive and selective than other methods described in the literature. |
| |
Keywords: | 1-naphthylacetic acid solid-phase spectrofluorimetry phytohormones analysis water analysis |
本文献已被 SpringerLink 等数据库收录! |