title: [Determination of nutrition elements in Yak milk powder by atomic absorption spectrometry].
abstract: In the present paper, orthogonal design test was planed by changing cinefaction temperature, cinefaction time, and the concentration of hydrochloric acid. Yak milk powder and milk powder were digested by dry method. The contents of elements Ca, Mg, Fe, Cu, Zn, Mn, K and Na were determined by flame atomic absorption spectrometry. The best conditions for the digestion were obtained as follows: the temperature was 510 degrees C, cinefaction time 4 hours, and hydrochloric acid concentration 1 : 5. Meanwhile, under the best experimental conditions, the recovery ratio of the method in the range of 95.2%-107.3%, and the relative standard deviations were 0.38%-3.86% (n=6). The experimental results proved that Yak milk powder is valuable and nutritious food, and has rich nutrition elements.
authors.affiliation: Key Laboratory of Food Science of MOE, Nanchang 330047, China. kwei@ncu.edu.cn
authors.forename: Yan
authors.initials: Y
authors.lastname: Shi
authors.forename: Wei-wan
authors.initials: WW
authors.lastname: Zheng
authors.forename: Wei-wei
authors.initials: WW
authors.lastname: Xiao
authors.forename: Jian-jun
authors.initials: JJ
authors.lastname: Song
authors.forename: Xiao-dan
authors.initials: XD
authors.lastname: Li
mesh_terms: D000818:Animals; D002417:Cattle; D008670:Metals / Q000032:analysis*; D008892:Milk / Q000737:chemistry*; D009753:Nutritive Value; D011208:Powders / Q000737:chemistry; D013054:Spectrophotometry, Atomic / Q000379:methods*
chemical_list: D008670:Metals; D011208:Powders