6Bedwal Rs. Effect of Zine Defficiency on G erm.Pregnanl ant Take the Breasl[J].Trace Elements In Medicine,1991,(02).
7Vidala M T. Determination of essential metals in complete diet feed by flow injection and flame atomic absorption spectrometry ~ J] . Microchemical Journal, 2002, 72 (2) : 221-228.
8International Organization for Standardization (ISO). ISO 27085-2009 Animal feeding stuffs -determination of cal- cium, sodium, phosphorus, magnesium, potassium, iron, zinc, copper, manganese, cobalt, molybdenum, arsenic, lead and cadmium by ICP-AES IS], 2009.
9Priego-Capote F, Luque de Castro M D. Dynamic ultra- sound-assisted leaching of essential macro and micronutfi- ent metal elements l~om animal feeds prior to flame atomic absorption spectrometry [ J] . Analytical and bioanalyti- calchemistry, 2004, 378 (5): 1376-1381.
10Oscar Mu~iz-Naveiro, Raquel Domfnguez-Gonz61ez, Adela Bermejo-Barrera, et al. Study of the bioavailability of selenium in cows' milk after a supplementation of cow feed with different forms of selenium [ J] . Analytical and bioanalytical chemistry, 2006, 385 (1) : 189-196.
