原子吸收光谱法和重金属快速检测法测定大米中镉含量的比较  

Comparison of determinations of cadmium content in rice by graphite furnace atomic absorption spectrophotometry and rapid detection of heavy metals

作　　者：罗凤莲[1] 杨纯[2] 林亲录[2,3] 欧阳建勋[4] 周文化[2,3] 

机构地区：[1]湖南农业大学食品科学技术学院,湖南长沙410128 [2]中南林业科技大学食品科学与工程学院,湖南长沙410004 [3]中南林业科技大学粮油深加工与品质控制湖南省2011协同创新中心,湖南长沙410004 [4]湖南省粮食局,湖南长沙410005

出　　处：《粮油食品科技》2016年第3期59-61,共3页Science and Technology of Cereals,Oils and Foods

基　　金：中南林业科技大学粮油深加工与品质控制湖南省2011协同创新中心项目

摘　　要：采用石墨炉原子吸收光谱法和重金属快速检测法分别测定大米样品中的镉含量。结果表明:两种方法测得大米的镉含量分别是0.287 8 mg/kg和0.288 6 mg/kg,相对误差(RE)分别为3.55%和3.28%,相对标准偏差(RSD)分别为10.71%和0.48%,两种方法测得大米镉含量结果无显著差异(P>0.05),但重金属快速检测法精密度优于原子吸收光谱法。重金属快速检测法可同时适用于快速筛选和精确定量,预期在粮食重金属检测方面具有很好的应用前景。Cadmium content in rice sample was determined by graphite furnace atomic absorption spectrometry and rapid detection of heavy metals method. The results showed that the cadmium content in rice were 0. 2878 mg / kg and 0. 2886 mg / kg,while relative error were 3. 55% and 3. 28%,relative standard deviation were 10. 71% and 0. 48% respectively. There were no significant differences between the results of the two methods( P > 0. 05),but the precision of rapid detection of heavy metals method was better than that of graphite furnace atomic absorption spectrometry,and can be used in rapid screening and accurate quantitative determination at the same time,which will have a good application prospect in detection of heavy metals in grain.

关 键 词：石墨炉原子吸收光谱法 重金属快速检测法 大米 镉含量 测定 

分 类 号：TS207.3[轻工技术与工程—食品科学]