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Multicommutation-NIR determination of Hexythiazox in pesticide formulations
Josep F Ventura-Gayete1, Sergio Armenta, Salvador Garrigues
1Department of Analytical Chemistry, Universitat de València, Edifici Jeroni Muñoz, 50 Doctor Moliner St., 46100 Burjassot, València, Spain.
Abstract:
A multicommutated flow-system was designed in order to increase analytical throughput and for controlling thermal effects on the NIR spectra for determination of Hexythiazox in pesticide formulations. An on-line standard addition was carried out showing the versatility and repeatability of multicommutation for the on-line mixing and dilution of solutions. Results obtained for commercial samples were statistically comparable with those obtained by an HPLC-reference method. Multicommutation-NIR allows the analysis of 52 samples per hour, in front of the 30 samples per hour analyzed by the NIR-batch procedure and the 7 samples per hour analyzed by HPLC-reference method.
