A rapid, specific microwave-assisted extraction high performance liquid chromatography is described for assaying three quinolones (fleroxacin, lomefloxacin and sparfloxacin) and two nonsteroidal anti-inflammatory agents (ketoprofen and ibuprofen) in samples of sheep liver, bovine muscle and milk. The optimal microwave-assisted extraction conditions such as extraction temperature (40 ), extraction time (6 min), solvent volume (10 mL) and ℃ solvent (acetonitrile) were determined by an orthogonal experiment. Recoveries were 60.0%-107% in the concentration range 0.25-0.75 µg•g -1 with good precision (＜11%) from three varieties of spiked animal samples.

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With the fast development of social economy, the competition between enterprises in construction projects becomes more and more serious. The cost control method is proposed to the bidding process of enterprises based on the gray system forecast. At the same time, the cost control software is also constructed to the bidding process of enterprises. Experimental results suggest that the proposed approach is feasible and correct.

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