Método para a determinação de hexazinone e tebutiuron em água

Vera L. Ferracini, Sonia C. N. Queiroz, Marco A. F. Gomes, Gustavo L. Santos
2005 Química Nova  
Recebido em 16/12/03; aceito em 4/1/05; publicado na web em 28/2/05 METHOD FOR DETERMINATION OF HEXAZINONE AND TEBUTHIURON IN WATER. This work presents an alternative method for determination of the herbicides tebuthiuron and hexazinone in ground water. The extraction was made with dichloromethane and the analyses by high performance liquid chromatography (HPLC), using reversed-phase column, C-18, mobile phase methanol/water 50:50, v/v, detection and quantification at 247 nm. The following
more » ... The following validation parameters were obtained: limit of detection of method 0.02 and 0.03 µg L -1 , limit of quantification of method 0.07 and 0.09 µg L -1 ; linear range limit of quantification of instrument -300 µg L -1 (r 2 ≥ 0.998); recoveries from 90.3 to 108.2% and 90.3 to 101.6%; intermediary precision (%RSD) < 8 and < 6%, for hexazinone and tebuthiuron, respectively. The method showed to be efficient and reliable for determination of the herbicides in ground water.
doi:10.1590/s0100-40422005000300003 fatcat:4lzoefllsjdkjejzh7bewi2zrq