固相光度法测定樟树树叶中微量稀土元素含量研究  

Determination of Trace Rare Earth Element Content in Camphor Tree Leaves by Solid-phase Spectrophotometry Research

作　　者：熊壮 Xiong Zhuang(Yueyang County Market Inspection Testing Center,Yueyang 414100,China)

机构地区：[1]岳阳县市场检验检测中心,湖南岳阳414100

出　　处：《山东化工》2024年第7期138-140,共3页Shandong Chemical Industry

摘　　要：以石蜡为固体萃取剂,8-羟基喹啉为显色剂,采用固相光度法测定樟树树叶中微量稀土元素的含量,探讨了不同因素对稀土元素测定的影响,确定了最佳分析条件。当镧稀土元素的质量浓度为0~1.6μg/mL时,溶液褪色程度与镧稀土元素含量呈线性关系,符合朗伯-比尔定律。镧稀土元素测试的相对标准偏差为2.5%,加标回收率为94.3%~106.1%。本方法灵敏度高、选择性好,测试结果满意。Trace rare earth elements in camphor tree leaves was determined by solid-phase spectrophotometry with paraffin as a solid extraction agent and 8-hydroxyquinoline as a chromogenic agent.The influence was investigated of various factors on rare earth elements and the optimum analytical conditions were determined.When the mass concentration of lanthanide rare earth elements ranges from 0 to 1.6μg/mL,there is a linear relationship between color fading degree and lanthanide rare earth elements content following Beer’s law.The relative standard deviation for the testing of lanthanide rare earth elements is 2.5%,and the spike recovery rate ranges from 94.3%to 106.1%.This method exhibits high sensitivity,excellent selectivity,and satisfactory test results.

关 键 词：石蜡 8-羟基喹啉 固相光度法 稀土元素 

分 类 号：O657.3[理学—分析化学]