二乙烯三胺五乙酸浸提-电感耦合等离子体发射光谱法测定土壤中有效态镉  

Determination of Available Cadmium in Soil by Inductively Coupled Ionoemission Spectrometry With Diethylene Triamine Pentaacetic Acid Extraction

作　　者：徐祥云 刘小林 黄子卿 姚泽 叶鹏 郭元强 辛虹瑾 XU Xiangyun;LIU Xiaolin;HUANG Ziqing;YAO Ze;YE Peng;GUO Yuanqiang;XIN Hongjin(Qujing Medical College,Qujing 655099,China;Southern Hunan Institute of Geology and Survey,Chenzhou 423002,China;Hunan Geological Experiment and Testing Center,Changsha 410007,China)

机构地区：[1]曲靖医学高等专科学校,云南曲靖655099 [2]湖南省湘南地质勘察院,湖南郴州423002 [3]湖南省地质实验测试中心,湖南长沙410007

出　　处：《湖南有色金属》2023年第5期99-102,共4页Hunan Nonferrous Metals

基　　金：云南省教育厅科学研究基金教师类项目资助(2019J1121);湖南省地质院科研项目资助(HNGSTP2022)。

摘　　要：文章建立了一种采用二乙烯三胺五乙酸(DTPA)浸提-电感耦合等离子体发射光谱法测定土壤中有效镉的分析方法。通过工作曲线、精密度、准确度和加标回收等试验对有效态镉测定方法进行确认和实际样品分析测试。在仪器最优工作条件下,该方法有效镉工作曲线相关系数r为0.999 9,检出限为0.005 mg/kg,有效镉的回收率为94.7%~96.6%。对3个国家一级土壤有效镉成分分析标准物质进行测定,测定结果的相对标准偏差RSD(n=6)在2.21%~2.77%之间,相对误差RE在0%~4.47%之间,且测试结果均能够达到参考值的不确定度范围内,表明该方法精密度和准确度均较高,满足HJ 804—2016标准方法要求,适合于土壤中有效镉的测定。A method for the determination of available cadmium in soil by inductively coupled ionoemission spectrometry was developed.Through the standard curve,precision,accuracy and standard recovery experiment to confirm the effective cadmium determination method and the actual sample test.Under the optimal working conditions,the correlation coefficient of cadmium standard curve was 0.9999,the detection limit was 0.005 mg/kg,and the effective cadmium recovery was 94.7%~96.6%.The relative standard deviations(n=6)of the determination results were 2.21%to 2.77%,and the errors were 0 to 4.47%,which all reached the uncertainty range of reference value,indicating that the precision and accuracy of the method were high.It meets the requirements of HJ 804—2016 standard method and is suitable for the determination of available cadmium in soil.

关 键 词：电感耦合等离子体发射光谱法 土壤 有效态 镉 

分 类 号：O657[理学—分析化学]