摘要
建立电感耦合等离子体质谱法测定河流底泥中钴、钼、锑、铊的含量。选用硝酸-双氧水-氢氟酸体系进行河流底泥的微波消解,利用内标铑和铼进行在线校正,并用动能歧视碰撞模式消除测定干扰。钴、钼、锑、铊的质量浓度在1~100μg/L范围内线性关系良好,相关系数均大于0.9997,检出限为0.009~0.021 mg/kg,测定结果的相对标准偏差为1.2%~5.2%(n=6),样品加标回收率为80.0%~93.2%。该方法可为河流底泥测定提供技术参考。
The content of cobalt,molybdenum,antimony and thallium in river sediment was determined by inductively coupled plasma mass spectrometry.The system of nitric acid-hydroxygen peroxide-hydrofluoric acid was selected for the microwave digestion of river sediment,rhodium and rhenium were used as the internal standard for online calibration,and the interference in determination was eliminated by kinetic discrimination collision mode.The mass concentrations of cobalt,molybdenum,antimony,and thallium had good linear relationships within the range of 1-100μg/L,with correlation coefficients greater than 0.9997,the detection limit was 0.009-0.021 mg/kg,the relative standard deviation was 1.2%-5.2%(n=6),and the recovery rate of sample spiking was 80.0%-93.2%.This method can provide technical reference for the determination of river sediment.
作者
朱君
黄晶
王晨希
杨蕾
ZHU Jun;HUANG Jing;WANG Chenxi;YANG Lei(Jiangsu Zhenjiang Environmental Monitoring Center,Zhenjiang 212000,China)
出处
《化学分析计量》
CAS
2023年第5期33-37,共5页
Chemical Analysis And Meterage
基金
镇江市社会发展指导性科技计划项目(FZ2022074)
镇江环境监测中心科研基金项目(ZJ2301)。
关键词
电感耦合等离子体质谱法
动能歧视碰撞模式
河流底泥
钴
钼
锑
铊
inductively coupled plasma mass spectrometry
kinetic discrimination collision mode
river sediment
cobalt
molybdenum
antimony
thallium
作者简介
通信作者:朱君,工程师,主要从事环境监测重金属分析研究。
