摘要
建立电感耦合等离子体质谱(ICP-MS)法测定深海鱼中放射性核素钚含量。对鳕鱼样品进行灰化和微波消解,以TEVA树脂对消解液中的钚进行富集提取,用10 mL的8 mol/L硝酸溶液洗脱铀,以铋为内标,采用ICP-MS法测定钚含量。钚的质量分数在0~1.0 ng/g范围内与钚和内标元素的响应信号的比值线性关系良好,相关系数为0.9999,方法检出限为0.03 ng/kg。样品加标平均回收率为64.6%~67.2%,测定结果的相对标准偏差为1.44%~4.29%(n=6)。该方法可用于深海鱼中钚含量的测定。
A method for the determination of radioactive nuclide plutonium content in deep-sea fish by inductively coupled plasma mass spectrometry(ICP-MS)was established.Ashing and microwave digestion were performed on cod samples,and plutonium in the digestion solution was enriched and extracted using TEVA resin.Uranium was eluted with 10 mL of 8 mol/L nitric acid solution.Bi was used as the internal standard,and the plutonium content was determined by ICPMS.The mass fraction of plutonium had a good linear relationship with the ratio of the response signal values of plutonium and internal standard element in the range of 0-1.0 ng/g.The correlation coefficient was 0.9999.The detection limit of the method was 0.03 ng/kg.The average recoveries of sample spiked were 64.6%-67.2%,and the relative standard deviation of the determination results was 1.44%-4.29%(n=6).The method can be used for the determination of plutonium content in deep-sea fish.
作者
王海涛
杜瑶芳
花晓月
任义广
吴文昊
WANG Haitao;DU Yaofang;HUA Xiaoyue;REN Yiguang;WU Wenhao(Yantai Customs Technical Center,Yantai 264000,China)
出处
《化学分析计量》
2025年第1期83-87,共5页
Chemical Analysis And Meterage
基金
海关总署科研项目(2022HK024)
海关总署科研项目(2024HK001)
青岛海关科研项目(QK202408)。
关键词
电感耦合等离子体质谱
深海鱼
钚
inductively coupled plasma mass spectrometry
deep-sea fish
plutonium
