原子光谱快速测定枇杷果中22种元素的质量分数

The Concentration of 22 Elements in Loquat Fruit Determined Rapidly by Atomic Spectrum

该试验旨在建立原子光谱快速测定枇杷果中22种元素分析方法。以枇杷果为研究对象,采用ICP-OES法测定样品中的19种元素的质量分数,AFS法测定样品中的3种元素的质量分数的分析方法。结果显示,22个元素在其线性范围内线性关系良好,r在0.9992~0.9999之间,3个水平的平均回收率在90.1%~98.0%之间,检出限范围为0.001~0.5 mg/kg,枇杷果中22种元素质量分数有16种元素高于检出限,6种低于检出限,枇杷果中16种元素浓度高低顺序为钾、钙、镁、钠、铝、铬、锶、硼、铁、铜、钡、锂、铅、锌、钒、砷。未检出的元素为镉、钛、钴、镍、汞、硒。枇杷果中铅、镉、镍、汞、砷、铬元素检测结果均小于GB 2762—2017《食品中污染物限量》中限值要求,其他16种元素作为枇杷果的元素拓展性研究。

To establish the concentration of 22 elements in loquat fruit determined rapidly by atomic spectrum,taking loquat fruit as the research object,the contents of 19 elements in the sample were measured by ICP-OES method,and the mass concentration of the 3 elements in the sample was measured by AFS method.The 22 elements had a good linear relationship within their linear range.The r was between 0.9992 and 0.9999,the average recovery rate of 3 levels was between 90.1%and 98.0%,and the detection limit range was 0.001-0.5 mg/kg.Among the content of 22 elements in the loquat fruit,16 elements were higher than the detection limit,and 6 elements were below the detection limit.The order of content of 16 elements in the loquat fruit was potassium,calcium,magnesium,sodium,aluminum,chromium,strontium,boron,iron,copper,barium,lithium,lead,zinc,vanadium and arsenic.The undetected elements were cadmium,titanium,cobalt,nickel,mercury and selenium.The detection results of lead,cadmium,nickel,mercury,arsenic and chromium in loquat fruit were all lower than the limit requirements of GB 2762—2017 Contaminant Limits in Foods.The other 16 elements were used as element sexual research in loquat fruit.