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Triazine herbicides are widely used in cereal and non-agricultural land for weed control, especially in the cornfields of atrazine most prominent. However, the use of triazine herbicides, will remain in the crop and soil, and because of such herbicides with a certain polarity, it is easy to dissolve in surface water, and quickly spread, resulting in a large area of ??the environment pollution thus causing serious harm to humans. Triazine past mostly concentrated in the detection of environmental samples and fruit, vegetables foods, cereal foods triazine pesticide residue detection method less. This paper establishes a nitrogen phosphorus detector with selective determination of triazine herbicides in cereals GC multi-residue methods. These include Cima pass triazine pesticides, herbicides go through, simazine, Ametryn Tianjin, propazine, tert-pass, trietazine, terbuthylazine, sec-butyl pass, another small-chun, diuron net, cyproterone Tianjin, simetryne, Ametryn prometryne, terbutryn, iso net, two tensiomin B net, cyproterone net, methoxy propionate net and hexazinone. Optional DB-5 capillary column temperature measured under the conditions of the program, first-time detection of 21 kinds of triazine pesticides. Acetonitrile as the extraction solvent used, do not assign a direct solid-phase extraction, simplifying the process of sample pretreatment cereals, organic solvents and saves operating time. Strong cation exchange column used as solid phase extraction column, and achieved good purification effect. Solid phase extraction step carried out under conditions of gravity, without special equipment, easy to operate. This paper also studied by gas chromatography - mass spectrometry as an independent detection method is feasible. In the selected ion mode to detect not only improves the sensitivity, but also can eliminate the interference of impurities. Both methods are diazinon as an internal standard, internal standard, retention time and quantified. Both methods 0.01-0.5mg/Kg four levels of cereal blank recoveries and relative standard deviations were satisfactory, while the method LOQ of 0.01mg/Kg. Not only can be used for cereal samples such as corn, wheat, barley, sorghum and rice, can also be used as a sample containing more fat soybeans triazine herbicides detected. The establishment of two methods to fill our triazine herbicides in cereals for multi-residue detection method blank. In addition, the method with good reproducibility, high sensitivity, with a strong practical, easy to use and promotion, has a good application prospect.
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