Authors: Heller, DN Lewis, KM Cui, W

Citation: Dn. Heller et al., Method for determination of pentobarbital in dry dog food by gas chromatography/mass spectrometry, J AGR FOOD, 49(10), 2001, pp. 4597-4602

Authors: Heller, DN Clark, SB Righter, HF

Citation: Dn. Heller et al., Confirmation of gentamicin and neomycin in milk by weak cation-exchange extraction and electrospray ionization/ion trap tandem mass spectrometry, J MASS SPEC, 35(1), 2000, pp. 39-49

Authors: Heller, DN Kaplan, DA Rummel, NG von Bredow, J

Citation: Dn. Heller et al., Identification of cephapirin metabolites and degradants in bovine milk by electrospray ionization-ion trap tandem mass spectrometry, J AGR FOOD, 48(12), 2000, pp. 6030-6035

Authors: Heller, DN

Citation: Dn. Heller, Liquid chromatography/mass spectrometry for timely response in regulatory analyses: Identification of pentobarbital in dog food, ANALYT CHEM, 72(13), 2000, pp. 2711-2716

Authors: Heller, DN Ngoh, MA

Citation: Dn. Heller et Ma. Ngoh, Electrospray ionization and tandem ion trap mass spectrometry for the confirmation of seven beta-lactam antibiotics in bovine milk, RAP C MASS, 12(24), 1998, pp. 2031-2040