On July 21, 2015, Thermo Fisher Scientific, the world leader in scientific services, recently announced the simultaneous determination of six carbamate pesticide residues in feeds using gas chromatograph GC-NPD. solution.
Carbamate pesticides are widely used in crop protection. Since the 1970s, due to the ban or restriction of organochlorine pesticides and the increasing number of insecticides resistant to organophosphorus pesticides, carbamate pesticides have become Following the organic chlorine and organic phosphorus, the third-generation insecticides are growing and growing, and because of their strong potency and easy decomposition and no residual toxicity, they are widely used to poison agricultural pests.
Because carbamate pesticides are used unscientificly, contaminating feed, and thus affecting live animals, causing human and animal poisoning to occur, many countries and regions have imposed strict limits on the residues of such pesticides in food. Standards, China's current national standard clearly stipulates that several kinds of carbamate limit is 0.02-0.04 mg / kg.
The method adopts the analysis method of carbamate in the analysis feed used by the national standard, and selects Thermo Scientific to establish an effective method for detecting the carbamate in the feed. In the national standard, petroleum ether-dichloromethane was used for extraction. The method was found to be better by acetone-n-hexane. At the same time, the national standard is filled with anhydrous sodium sulfate, Florisil silica glass column for purification, the method is purified by Florisl solid phase extraction column, the purification effect is better, the recovery rate is higher, and it is more beneficial for NPD detection. The life of the bead is extended. The method is accurate, high in sensitivity, and meets the detection requirements.
Product Link: Thermo Scientific Gas Chromatograph
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Solution Steps: Thermo Scientific Test of Pesticide Residues by Thermo Scientific
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