原子吸收光谱法测定龙眼果肉中钙、锰、铜微量元素  

Determination of Ca,Mn and Cu in Longan Fruit by Flame Atomic Absorption Spectrometry

作　　者：吴丹丹 廖明聪[1,2] 朱丹琛 WU Dan-dan;LIAO Ming-cong;ZHU Dan-chen(College of Environmental and Biological Engineering;Fujian Provincial Key Laboratory of Ecology-toxicological Effects&Control for Emerging Contaminants,Putian University,Putian,Fujian 351100)

机构地区：[1]莆田学院环境与生物工程学院 [2]莆田学院福建省新型污染物生态毒理效应与控制重点实验室,福建莆田351100

出　　处：《怀化学院学报》2021年第5期34-38,共5页Journal of Huaihua University

基　　金：福建省自然科学基金项目“基于金纳米材料构建表面增强拉曼散射传感器用于食源性细菌的快速检测研究”(2020J01914);福建省教育厅项目“海藻酸钠凝胶微球包埋性能研究”(JAT200537);莆田学院教育教学改革项目“新工科理念下化工原理实验教学改革初探”(JG201925).

摘　　要：采取正交实验法优化了超声波辅助提取龙眼中微量元素的条件,采用火焰原子吸收光谱法测定龙眼中Ca、Mn、Cu含量.在最佳实验条件下,即消解液体积为10 mL,超声时间为20 min,超声浴温度为70℃,测出龙眼果实中钙、锰、铜元素的含量分别是983.175μg·g^(-1),2.437μg·g^(-1),9.055μg·g^(-1);精密度分别为1.7%,0.8%,0.2%;回收率分别是103.64%,93.38%,101.83%;检出限分别是0.02469μg·mL^(-1),0.04664μg·mL^(-1),0.07004μg·mL^(-1).超声提取法具有高效、环保、操作便捷等优点,有较好的应用价值.In this paper,the condition for determining trace elements in longan was optimized by ultrasonic assisted extraction.The content of Ca,Mn and Cu in longan by flame atomic absorption spectrometry was established by orthogonal experiment.Under the optimum experimental conditions,the volume of digestion solution was 10 mL,the ultrasonic time was 20 min,and the ultrasonic bath temperature was 70℃,the contents of Ca、Mn and Cu in longan fruit were 983.175μg/g,2.437μg/g and 9.055μg/g respectively.The precision rates of these trace elements were 1.7%,0.8%,0.2% respectively;the recovery rates were 103.64%,93.38%,101.83% respectively;the detection limits were 0.02469μg·mL^(-1),0.04664μg·mL^(-1),0.07004μg·mL^(-1) respectively.Ultrasonic assisted extraction has the characteristics of high efficiency,environmental protection and convenient operation,thus good for practical application.

关 键 词：超声波 火焰原子吸收光谱法 龙眼 正交实验 

分 类 号：O611.5[理学—无机化学]