From a study of Wang et al Shumei (2013), chemical removal of pest monitoring residues in vegetables such as cabbage. White lettuce Green leaf vegetables from the market of Shanxi China is using Gas Chromatography (GC) in the analysis of the chemical chlorpyrifos, omethoate, phorate was found, methidathion, organic substance ethoprophos group no phosphate residues exceeding the set standard, the maximum quantity of toxic residues and residue of vegetables with the highest, is the Sha and khuen, Ministry of public health (2555) found in the country, Thailand. Green leaf vegetables contaminated with chemical residues, vegetable, vegetables, kale is Guangdong. Slug vegetables cabbage, respectively. A group of chemical residue found on the most is the organic group no phosphate. 65.4 percent of Carlton group mate 4.5 percent of BAA and animal pesticides 10.3 per cent to nibble and more per cent of the vegetables we 19.9 imported from abroad, it still found a chemical pest residue removal.
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