Investigation and analysis of organophosphorus pesticide residues in vegetables collected from Guangzhou.

A survey of organophosphorus pesticide in sixty four vegetable samples collected randomly from four supermarkets and one vegetable wholesale market of Guangzhou city was carried out from September to December in 2009. Gas chromatography analysis for 11 organophosphorus pesticide residues in the samples showed that the qualification rate of leaf vegetables was 71.43%, and no investigated pesticide residue was detected in the all examined raw melons vegetables, the solanaceous fruit vegetables and the root vegetables. Five kinds of organophosphorus pesticides were detected in 10 kinds of samples (64 samples) with the disqualification rate being of 15.63%, among which three prohibited pesticides for planting vegetables according to relevant laws were detected. Forbidden pesticide residuee were detected with relatively high frequency in the vegetable samples. These toxicants get into the human body through the food chain, and cause serious health problems. So supervision and administration of these pesticides should be strengthened.