亚氨基二乙酸型螯合树脂柱-电感耦合等离子体质谱法测定家禽养殖废水中7种金属元素的残留量  

Determination of Residues of 7 Metal Elements in Poultry Farming Wastewater by Inductively Coupled Plasma Mass Spectrometry with Iminodiacetic Acid Chelating Resin Column

作　　者：刘晓燕 LIU Xiaoyan(Gansu Jiuquan Ecological Environment Monitoring Center,Jiuquan 735000,China)

机构地区：[1]甘肃省酒泉生态环境监测中心,酒泉735000

出　　处：《理化检验（化学分册）》2024年第7期744-748,共5页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：提出了亚氨基二乙酸型螯合树脂柱-电感耦合等离子体质谱法测定家禽养殖废水中铅、锰、钡、镉、铝、铬、钴等7种金属元素残留量的方法。取预处理后的家禽养殖废水样品25 mL,以2.0 mL·min^(−1)流量过活化后的亚氨基二乙酸型螯合树脂柱;用15 mL水清洗,15 mL 5%(体积分数,下同)硝酸溶液洗脱,收集洗脱液,用5%硝酸溶液定容至25 mL;按照电感耦合等离子体质谱仪的工作条件测定得到的待测样品溶液中7种金属元素的含量,内标法定量。结果表明:7种金属元素标准曲线的线性范围均为0.005~8.0μg·L^(−1),检出限(3S/N)为0.006~0.018 ng·L^(−1);加标样品中7种金属元素测定值的相对标准偏差(n=6)为1.7%~3.8%,回收率为82.5%~93.0%。A method for the determination of residues of 7 metal elements,including lead,manganese,barium,cadmium,aluminum,chromium and cobalt in poultry farming wastewater by inductively coupled plasma mass spectrometry with iminodiacetic acid chelating resin column was proposed.The poultry farming wastewater sample(25 mL)after pretreatment was taken,and passed through the activated iminodiacetic acid chelate resin column at flow rate of 2.0 mL·min^(−1).The column was washed with 15 mL of water,and eluted with 15 mL of 5%(volume fraction,the same below)nitric acid solution.The eluate was collected,and its volume was made up to 25 mL with 5%nitric acid solution.7 metal elements in the obtained sample solution were determined according to the working conditions of the inductively coupled plasma mass spectrometer,and internal standard method was used for quantification.It was shown that the linear ranges of the standard curves for 7 metal elements were 0.005-8.0μg·L^(−1),with detection limits(3S/N)in the range of 0.006-0.018 ng·L^(−1).RSDs(n=6)of the determined values of 7 metal elements in the spiked sample were in the range of 1.7%-3.8%,and the recovery was in the range of 82.5%-93.0%.

关 键 词：亚氨基二乙酸型螯合树脂柱 电感耦合等离子体质谱法 家禽养殖废水 金属元素 

分 类 号：O657.63[理学—分析化学]