Determination of Organophosphorus Pesticides in Water, Vegetables and Grain by Automated SPE and MEKC T. Pérez-Ruiz, C. Martínez-Lozano, A. Sanz and E. Bravo Chromatographia:2005 Volume 61, Numbers 9-10; 493-498 链接: http://www.springerlink.com/content/h706347505765667/