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A liquid chromatography method using a monolithic column for the determination of corticoids in animal feed and animal feeding water
Muñíz Valencia, Roberto; Ceballos Magaña, Silvia G.; Gonzalo Lumbreras, Raquel; Santos Montes, Ana María; Izquierdo Hornillos, Roberto (01/01/2008)An HPLC-DAD method for determining corticoids in calf feed and in animal feeding water samples using a monolithic column has been developed and validated. The method optimization included the study of binary mobile phases ... -
GC-MS method development and validation for anabolic steroids in feed samples
Muñíz Valencia, Roberto; Ceballos Magaña, Silvia G.; Gonzalo Lumbreras, Raquel; Santos Montes, Ana María; Izquierdo Hornillos, Roberto (01/03/2008)A GC-MS method for the determination of AAS used as growth promoting agents using SIM in piglet feed samples has been developed and validated, using testosterone as internal standard. The formation of volatile steroid ... -
Liquid chromatographic method development for anabolic androgenic steroids using a monolithic column Application to animal feed samples
Muñíz Valencia, Roberto; Gonzalo Lumbreras, Raquel; Santos Montes, Ana María; Izquierdo Hornillos, Roberto (01/03/2008)An isocratic HPLC method for the determination with screening purposes of anabolic androgenic steroids (AASs: fluoxymesterone, boldenone, nortestosterone, metandrostenolone, norethindrone, methyltestosterone and bolasterone), ... -
Liquid chromatographic method development for steroids determination (corticoids and anabolics). Application to animal feed samples
Gonzalo Lumbreras, Raquel; Muñíz Valencia, Roberto; Santos Montes, Ana María; Izquierdo Hornillos, Roberto (01/07/2007)A LC isocratic separation study of a complex mixture containing 18 steroids (corticoids and anabolics), used potentially as growth promoters, was carried out. For this purpose, using a Hypersil ODS column at controlled ... -
Method development and validation for melamine and its derivatives in rice concentrates by liquid chromatography. Application to animal feed samples
Muñíz Valencia, Roberto; Ceballos Magaña, Silvia G.; Rosales Martínez, Daniel; Gonzalo Lumbreras, Raquel; Santos Montes, Ana María; Cubedo Fernández-Trapiella, Angel; Izquierdo Hornillos, Roberto (01/10/2008)An isocratic LC method for the determination of melamine and its degradation products (ammelide, ammeline, and cyanuric acid), used to increase the apparent protein content of rice protein concentrate, has been developed. ... -
Method development validation for corticoids in animal feed samples by liquid chromatography using a monolithic column
Muñíz Valencia, Roberto; Gonzalo Lumbreras, Raquel; Santos Montes, Ana María; Izquierdo Hornillos, Roberto (01/11/2007)A LC method for corticosteroids (CC) determination in poultry feed using a Chromolith column and UV detection has been developed and validated. The method development involved the optimization of different hydro-organic ... -
Quantitative screening for steroids in animal feeding water using reversed phase LC with gradient elution
Muñíz Valencia, Roberto; Gonzalo Lumbreras, Raquel; Santos Montes, Ana María; Izquierdo Hornillos, Roberto (01/02/2008)Several isocratic separations for the determination of 20 steroids (STER) in animal feeding water samples (AFWS) from drinking-trough by LC using a mobile phase ACN/H(2)O (35:65 v/v) and different RP columns (Hypersil C18, ... -
Sample preparation for the determination of steroids (corticoids and anabolics) in feed using LC
Muñíz Valencia, Roberto; Ceballos Magaña, Silvia G.; Gonzalo Lumbreras, Raquel; Santos Montes, Ana María; Izquierdo Hornillos, Roberto (01/07/2008)An improved sample preparation procedure for the determination of 17 steroids (corticoids (CC) and androgenic anabolic steroids (AAS)), used potentially as growth promoters, in feed samples has been developed. This procedure ...