English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/115317
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Determination of Major Minerals in Dairy Products Digested in Closed Vessels Using Microwave Heating

AutorFuente, Miguel Ángel de la ; Carazo, Belén; Juárez, Manuela
Palabras claveMineral analysis
Dairy products
Microwave digestion
Fecha de publicación1997
EditorAmerican Dairy Science Association
CitaciónJournal of Dairy Science 80: 806- 811 (1997)
ResumenA method is described for digestion of a variety of solid dairy products (cheeses, caseinates, and milk powders) for subsequent determination of Ca, Mg, Na, and K by flame atomic spectrophotometry. Sample preparation included a microwave digestion system in closed vessels. The procedure has been validated for skim milk powder employing various reaction mixtures that contain HNO3, HClO4, and H2O2. Accurate results were achieved for Na and K with mixtures of HNO3 and H2O2, but values for Ca and Mg were low. Although the results of these elements were improved when HClO4 was used instead of HNO3, greatest accuracy was obtained by measurement, using standard addition, of samples digested with mixtures of HNO3 and H2O2. The assays exhibited varying degrees of precision when used for caseinates and cheese. The coefficients of variation for replicate analyses of caseinates and cheeses were lowest for Mg (1.34 to 2.46%) and Ca (1.15 to 2.69%) and poorest for Na (3.35 to 9.02%). However, accuracy was greater for Na and K analyses; recoveries of these elements were very close to 100% (Na, 96.3 to 99.2%; K, 97.8 to 99.8%) but recoveries of Ca and Mg were lower (Ca, 91.6 to 98.8%; Mg, 94.0 to 98.4%).
DOI10.3168 / jds.S0022-0302 (97) 76001-6
Identificadoresdoi: 10.3168 / jds.S0022-0302 (97) 76001-6
issn: 0022-0302
Aparece en las colecciones: (IF) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Mostrar el registro completo

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.