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.
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
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
graphite furnace atomic absorption spectrophotometry(GFAAS)
rapid detection of heavy metals
rice
cadmium content
determination
