针对有机水稻认证中部分重金属检测标准的探讨

Discussion on Test Standard of Some Heavy Metals in Authentication of Organic Rice

针对有机水稻认证中重金属检测存在检测样品选择不规范、检测指标标准不一的问题,分析了水稻重金属的来源、污染现状和重金属在水稻植株体内的富集规律,并根据国家采用的《粮食卫生标准》(GB2715-2005)有针对性地对有机水稻重金属检测提出了2点建议:一是有机水稻认证过程中检测样品应为糙米或者是大米;二是检测指标应是无机砷(以As计)、汞(Hg)、镉(Cd)、铅(Pb)。

In authenticating organic rice, problems can be discovered in testing heavy metals, such as improper selection of test samples and various testing methods. On this basis, the thesis analyzes the sources of heavy metals contained in rice, pollution status and the enrichment rule of the heavy metals within the rice plant body. Besides, in accordance with the National Hygienic Standard for Grains （GB2715-2005） , the thesis proposes two suggestions ： first, the test samples used in the authentication of organic rice should be brown rice or rice ; second, the test index should include inorganic arsenic （As） , Hg, Cd and Pb.