连续光源原子吸收光谱仪测定大米中微量元素  

Determination of Trace element in Rice by Continuum Source Atomic Absorption Spectrometry

作　　者：时超 SHI Chao(Food Quality and Safety Centre,Nutrition and Health Research Institute,COFCO,Beijing 102209)

机构地区：[1]中粮营养健康研究院食品质量与安全中心

出　　处：《安徽农业科学》2019年第15期198-200,共3页Journal of Anhui Agricultural Sciences

摘　　要：[目的]建立高分辨连续光源原子吸收光谱仪同时测定大米中铁、锰、锌、铜的方法。[方法]测定不同浓度标准溶液的吸光度,建立标准曲线,对大米中的Fe、Mn、Zn、Cu4种元素进行测定,并对方法的检出限、精密度和准确度进行分析。[结果]该方法对Fe、Mn、Zn、Cu的检出限分别为0.028、0.014、0.052、0.009mg/L;相对标准偏差分别为4.0%、1.4%、3.4%、2.9%;用国家一级标准物质辽宁大米(GBW10010)验证了方法的准确性,测定值与推荐值相符。[结论]该方法适用于同时测定多种元素,具有操作简单、效率高、稳定性好的特点。[Objective] The research aimed to establish a new method to determine metal elements of Fe,Mn,Zn and Cu simultaneously in rice with high-resolution continuum source atomic absorption spectrometry.[Method]The absorbance of standard solution with various concentrations were determined, the standard curve as established. Metal elements of Fe,Mn,Zn and Cu in rice were determined,then made analysis on the detection limit, precision and accuracy.[Result]The established method presented the limit detection of Fe,Mn,Zn and Cu in rice were 0.028,0.014,0.052,0.009 mg/L.The relative standard deviation were 4.0%,1.4%,3.4%,2.9%.The accuracy of the method was verified by the national standard reference material Liaoning rice (GBW10010), and the measured value was consistent with the recommended value.[Conclusion]This method was suitable for simultaneously determining several elements with the easy operation,advantage of high efficiency and good stability.

关 键 词：大米 微量元素 连续光源原子吸收法 

分 类 号：TS207.3[轻工技术与工程—食品科学]