José E Roybal

Quantitative and Confirmatory Analyses of Malachite Green and Leucomalachite Green Residues in Fish and Shrimp

Wendy C. Andersen, Sherri B. Turnipseed, José E Roybal · Journal of Agricultural and Food Chemistry · 2006 · 161 citations

Pharmacy, Food Science, Toxicology +17

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 · 115 citations

Natural Sciences, Chemistry, Toxicology +17

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

Agriculture, Food Science, Toxicology +17

Analysis of avermectin and moxidectin residues in milk by liquid chromatography–tandem mass spectrometry using an atmospheric pressure chemical ionization/atmospheric pressure photoionization source

Sherri B. Turnipseed, José E Roybal, Wendy C. Andersen et al. · Analytica Chimica Acta · 2005 · 76 citations

Agriculture, Food Science, Pharmaceutical Analysis +10

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

Pharmacy, Biochemistry, Analytical Toxicology +15