Jorhem L, Astrand C, Sundstrom B, Baxter M, Stokes P, Lewis J, Grawe K P
National Food Administration, SE-751 26 Uppsala, Sweden.
Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2008 Jul;25(7):841-50. doi: 10.1080/02652030701701058.
A survey of the levels of some essential and non-essential trace elements in different types of rice available on the Swedish retail market was carried out in 2001-03. The types of rice included long and short grain, brown, white, and parboiled white. The mean levels found were: chromium (Cr) = 0.008 mg kg(-1), copper (Cu) = 1.9 mg kg(-1), iron (Fe) = 4.7 mg kg(-1), manganese (Mn) = 16 mg kg(-1), platinum (Pt) < 0.0003 mg kg(-1), rubidium (Rb) = 3.3 mg kg(-1), selenium (Se) =0.1 mg kg(-1); and zinc (Zn) = 15 mg kg(-1). Inductively coupled plasma-mass spectrometry (ICP-MS) was used for the determination of Pt, Rb, and Se, after acid digestion. All other elements were determined using atomic absorption spectrometry (AAS) after dry ashing. Intake calculations were performed and it was concluded that rice may contribute considerably to the daily requirements of the essential elements Cu, Fe, Mn, Se, and Zn if rice consumption is high. The levels of some elements, e.g. Fe and Mn, were significantly higher in brown compared with white rice.
2001年至2003年，对瑞典零售市场上不同类型大米中的一些必需和非必需微量元素水平进行了一项调查。大米类型包括长粒米和短粒米、糙米、白米和预煮白米。测得的平均水平为：铬（Cr）=0.008毫克/千克，铜（Cu）=1.9毫克/千克，铁（Fe）=4.7毫克/千克，锰（Mn）=16毫克/千克，铂（Pt）<0.0003毫克/千克，铷（Rb）=3.3毫克/千克，硒（Se）=0.1毫克/千克；锌（Zn）=15毫克/千克。经酸消解后，采用电感耦合等离子体质谱法（ICP-MS）测定铂、铷和硒。所有其他元素在干灰化后使用原子吸收光谱法（AAS）进行测定。进行了摄入量计算，得出的结论是，如果大米消费量很高，大米可能对必需元素铜、铁、锰、硒和锌的每日需求量有很大贡献。与白米相比，糙米中某些元素（如铁和锰）的含量明显更高。
