摘要
建立了采用测汞仪直接测定稻谷及其制品中总汞含量的方法,对20份稻谷及其制品中总汞含量进行了测定和分析。结果表明,方法在0～400 ng范围内呈良好线性关系,最低检出限为0.1μg/kg,定量下限为1μg/kg,相对标准偏差（RSD）均在2.0%以内。测定国家标准参考物质辽宁大米和湖南大米,测定值均在标示值范围内,与国标方法比较结果无显著差异。所测稻谷及其制成的糙米和大米的总汞含量均在国标限量值以下,稻谷中总汞主要分布在大米中,其次是糙米表皮部分,稻壳部分中含量相对较低。
Determination method for total mercury in paddy and products directly by mercury analyzer was established. Meanwhile, the total mercury content in 20 portions of paddy sample had been investigated by the method. The results indicated that a good linearity was observed within a range from 0 - 400 ng, the minimum detection limit was 0.1 μg/kg, the minimum quantitative limit was 1 μg/kg, the relative standard deviation （RSD） was less than 2.0 %. The results of determining national reference material, Liaoning rice （GBW10043） and Hunan rice （GBW10045）, were all in the scope of standard values. Compared with national method, the result has no remarkable difference. The total mercury in both paddy and products were all below the national standard limit. The mercury were main concentrated in rice, secondly in the rice bran, while nearly none in rice husk.
作者
曾云军
周斌
陈俊旭
汪泽生
ZENG Yun - jun ZHOU Bin CHEN Jun - xu WANG Ze - sheng(Chongqing Grain and Oil Inspection and Supervision Institute, Chongqing 40003)
出处
《粮油食品科技》
2016年第6期63-66,共4页
Science and Technology of Cereals,Oils and Foods
关键词
汞
直接测汞仪
稻谷
mercury
direct mercury analyzer
paddy
