TY - SER AU - Zhang,Xiaopan TI - Determination of β-lactam antibiotics in milk based on magnetic molecularly imprinted polymer extraction coupled with liquid chromatography-tandem mass spectrometry N1 - YA2011 M05 ISSN - 1570-0232 Sources - Journal of Chromatography B Sources - 878 (32) 2010 : 3421-3426 ER -