2Elliott CT, Namkung H, Paik. Screening and Confirmatory Determination of Ractopamine Residues in Calves Treated With Growth Promoting Doses of the Agonist. Analyst, 1998,123(5):1103-1107.
3Daniel R, Doerg. Detection and Confirmation of β-Agonists in Bovine Retina Using LC/APCI-MS[J].Anal chem, 1996,68:1918-1923.
4Fiona J, Coupe. Gas chromatographic-mass spectrometric determination of β2-agonists in postmortem blood: application in forensic medicine[J].ournal of Chromatography B, 1996,685:265-272.
5Fernando Ramos. β2-Adrenergic agonist residues: simultaneous methyl-and butylboronic derivatization for confirmatory analysis by gas chromatography- mass spectrometry[J].Journal of Chromatography B, 1998,716:366-370.