4Hallberg L.Bioavailability of dietary cron in man[J].Ann Rev Nutr,1981,1:123.
5Ballot DE,Macpheil AP,Bothwell TH,et al.Fortification of curry power with NaFeEDTA (Ⅲ)in a iron deficiency population:initial survey ofeiron status.Am J Clin Natr,1989,49:156.
6Yip R,Blinkin NJ,Fleshood L,Trowbridge FL.Declining prevalence of anemia among low-income children in the United State.JAJA.1987,258:1619~1623.
7Hallberg L,Bengtsson C,Garby L,et al.An analysis of factors leading to a reduction in iron deficiency in Swedish women.Bull World Health Organ.1979,57:947~954.
8William S.official methods of analysis of the association of official analytical chemists.14th ed.USA.1984:800.