A Comparison of Electron-Capture GLC, Electrolytic-Conductivity GLC and UV-Absorption HPLC for the Analysis of Some Herbicides in Foods

摘要: A comparison of gas chromatography with electron-capture or electrolytic-conductivity (nitrogen mode) detection, and high-pressure liquid (HPLC) UV-absorption detection (254 nm) was carried out for the analysis several herbicides in foods. Linuron, propanil, terbacil, benzoylprop-ethyl, fungicide DCNA samples cabbage, corn, potato, wheat spiked at 2 0.2 ppm were examined. The pesticides extracted acetone, partitioned into petroleum ether-methylene chloride, cleaned up on a 2% deactivated Florisil column before direct chromatographic analysis. Electron-capture gas-liquid (GLC) most suitable benzoylprop-ethyl while HPLC best terbacil Linuron propanil gave similar results both GLC HPLC. Electrolytic-conductivity could detect all level exhibited least number extraneous peaks chromatograms.