Výsledky vyhledávání - "E J, Kentzer"

Ion-pair reverse-phase liquid chromatographic determination of amprolium in complete feeds and premixes

Autor: E J, Kentzer, L S, Cottingham, R L, Smallidge

Publikováno v: Journal - Association of Official Analytical Chemists. 71(2)

Amprolium is extracted with methanol-water (2 + 1) containing 5mM dioctylsulfosuccinate (DOSS) and 10mM CaCl2. The analyte is separated from coextracted materials by isocratic ion-pair reverse-phase liquid chromatography, following removal of late-el

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::b3359ee08c7f824ff303f81e086251ea
https://pubmed.ncbi.nlm.nih.gov/3384778

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Sulfamethazine and sulfathiazole determination at residue levels in swine feeds by reverse-phase liquid chromatography with post-column derivatization

Autor: R L, Smallidge, E J, Kentzer, K R, Stringham, E H, Kim, C, Lehe, R W, Stringham, E C, Mundell

Publikováno v: Journal - Association of Official Analytical Chemists. 71(4)

Twenty g sample, to which sulfamerazine has been added as internal standard, is extracted with 0.3N HCl + 1.5% diethylamine in 25% methanol. The sample extract is chilled (to aid clarification), centrifuged, and filtered. The sulfonamides are separat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::e7332e0b5c894930b91c3503d8cd8cd4
https://pubmed.ncbi.nlm.nih.gov/3417586

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