U. Brinkman, A. Kok, R. B. Geerdink
1984
Citations
0
Influential Citations
46
Citations
Journal
Journal of Chromatography A
Abstract
Abstract Direct derivatisation of fifteen phenylurea herbicides with heptafluorobutyric anhydride (HFBA) has been studied. Quantitative conversion is obtained within 1 h at 60°C, using hexane as solvent. The nuclear magnetic resonance and mass spectrometric characteristics of the HFB-herbicides are reported, as well as their behaviour in adsorption high-performance liquid chromatography and capillary gas chromatography; detection limits are of the order of 50 pg and 1 pg, respectively, using electron-capture detection. Applications to water and crop samples are reported.