Allen P Pfenning

Determination of tetracycline residues in shrimp and whole milk using liquid chromatography with ultraviolet detection and residue confirmation by mass spectrometry

Wendy C. Andersen, José E Roybal, Steve A Gonzales et al. · Analytica Chimica Acta · 2004 · 115 citations

Food Chemistry, Residue Confirmation, Health Sciences +13

Simultaneous Determination of Residues of Chloramphenicol, Florfenicol, Florfenicol Amine, and Thiamphenicol in Shrimp Tissue by Gas Chromatography with Electron Capture Detection

Allen P Pfenning, José E Roybal, Heidi S Rupp et al. · Journal of AOAC International · 2000 · 113 citations

Solvent Extraction, Gas Chromatographic, Residue (Chemistry) +23

Determination of Malachite Green and Its Metabolite, Leucomalachite Green, in Catfish (Ictalurus punctatus) Tissue by Liquid Chromatography with Visible Detection

José E Roybal, Allen P Pfenning, Robert K Munns et al. · Journal of AOAC International · 1995 · 48 citations

Bioconcentration, Residual Mg, Engineering +22

Use of ion-trap liquid chromatography–mass spectrometry to screen and confirm drug residues in aquacultured products

Sherri B. Turnipseed, José E Roybal, Allen P Pfenning et al. · Analytica Chimica Acta · 2003 · 46 citations

Aquacultured Products, Environmental Chemistry, Engineering +13

Simultaneous Determination of Chloramphenicol, Florfenicol, and Thiamphenicol Residues in Milk by Gas Chromatography with Electron Capture Detection

Allen P Pfenning, Mark R. Madson, José E Roybal et al. · Journal of AOAC International · 1998 · 44 citations · Full text