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The procedure involves a step for clean\u2010up and to preconcentrate the analytes by SPE and a subsequent chromatographic analysis. LC\u2010UV, LC\u2010MS and LC\u2010MS\/MS have been used for the simultaneous quantification of penicillins in milk. The proposed methods have been validated according to the EU guideline and present LOQ below the maximum limits of residues (MRLs) established by the European Union for penicillins in milk. The developed methods were applied to different milk samples obtained from cows medicated with penicillins.<\/jats:p>","DOI":"10.1002\/jssc.200900212","type":"journal-article","created":{"date-parts":[[2009,6,25]],"date-time":"2009-06-25T08:59:40Z","timestamp":1245920380000},"page":"2385-2393","source":"Crossref","is-referenced-by-count":31,"title":["Determination of penicillins in milk using LC\u2010UV, LC\u2010MS and LC\u2010MS\/MS"],"prefix":"10.1002","volume":"32","author":[{"given":"Miriam","family":"Mart\u00ednez\u2010Huelamo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Esther","family":"Jim\u00e9nez\u2010G\u00e1mez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria Pilar","family":"Hermo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dolores","family":"Barr\u00f3n","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9","family":"Barbosa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2009,7,14]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac040138q"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.chroma.2005.02.037"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1093\/jac\/38.1.1"},{"key":"e_1_2_1_5_2","unstructured":"Commission of the European Communities Diario Oficial de las Comunidades EuropeasNo. 2377\/90 L224 August 18 1990."},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1002\/jssc.200700647"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.trac.2005.02.007"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.aca.2004.04.022"},{"key":"e_1_2_1_9_2","doi-asserted-by":"publisher","DOI":"10.1002\/jssc.200600137"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1080\/10826070701274320"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.chroma.2008.05.090"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.aca.2008.02.045"},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.chroma.2005.11.080"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1021\/jf010057k"},{"key":"e_1_2_1_15_2","doi-asserted-by":"publisher","DOI":"10.1021\/jf010994s"},{"key":"e_1_2_1_16_2","doi-asserted-by":"publisher","DOI":"10.1021\/jf0499572"},{"key":"e_1_2_1_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.foodchem.2005.09.021"},{"key":"e_1_2_1_18_2","doi-asserted-by":"publisher","DOI":"10.1002\/rcm.3532"},{"key":"e_1_2_1_19_2","doi-asserted-by":"publisher","DOI":"10.1021\/jf010046r"},{"key":"e_1_2_1_20_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9673(98)00048-X"},{"key":"e_1_2_1_21_2","doi-asserted-by":"publisher","DOI":"10.1021\/ac0011383"},{"key":"e_1_2_1_22_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.chroma.2008.07.066"},{"key":"e_1_2_1_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0021-9673(97)01291-0"},{"key":"e_1_2_1_24_2","unstructured":"Official J. 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