Abstract
Abstract A normal-phase liquid chromatographic method was developed to determine oxyfluorfen, a herbicide, in pesticide formulations. Technical and liquid formulations were dissolved in 10% water and 90% tetrahydrofuran. A 5 μL aliquot was injected into a Phenomenex Spherex amino column and monitored at 240 nm. The mobile phase was tetrahydrofuran-hexane (5 + 95). Total analysis time was 80 min. Six different liquid formulations and 1 solid formulation were analyzed. Within-day percent coefficients of variation (%CVs) ranged from 0.5 to 3.5, and between-day %CVs ranged from 1.4 to 3.9. Purity of each oxyfluorfen chromatographic peak was checked by using a photodiode array detector in the spectrum mode. No interferences were observed.
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