Gas-Liquid Chromatographic Determination of Bromoxynil Octanoate: Collaborative Study

Abstract

The assay of bromoxynil octanoate by a gasliquid chromatographic (GLC) procedure with din-n-butylphthalate as the internal standard was previously subjected to collaboration. The method had a standard deviation of 0.6% but results varied according to the complexity of the formulaation being tested. To reduce the systematic errors of the method, the internal standard was changed to n-docosane. The change in elution time of the marker simplified the chromatogram and reduced the standard deviation of the study to 0.3%. The revised method has been adopted as official first action for determining bromoxynil octanoate.

Comparison of liquid and gas chromatography for the determination of bromoxynil octanoate and benzoylprop ethyl in wheat products

“…At the present time no routine method exists which can adequately screen for them. Of the five herbicides, only bromoxynil octanoate (Helfant, 1979) and benzoylprop ethyl (Wright and Mathews, 1976) pass Food Research Division, Food Directorate, Health Protection Branch, Tunney's Pasture, Ottawa, Ontario K1A 0L2, Canada. through a gas chromatograph (GC) without derivatization.…”