摘要
采取电感耦合等离子质谱法(ICP-MS)测定HF:H_(2)O_(2):NO_(2)Cl混酸体系下高压密闭酸热解煤矸石中铬、砷、镉、汞和铅5类重金属。采用^(52)Cr、^(75)As、^(114)Cd、^(202)Hg和^(208)Pb同位素元素进行测试,钪(^(45)Sc)、钇(^(89)Y)、铟(^(115)In)和铋(^(209)Bi)4种内标物质进行基体信号的校正以及漂移的抑制。通过测定新疆、内蒙古、广东、陕西4个地区的国家土壤标准样品GBW 07450、GBW 07446、GBW 07453、GBW 07454验证方法的准确性。铬、砷、镉、汞和铅在0.1~100 ng/mL范围内,校准曲线的线性相关系数均大于0.9995,分析方法检出限均小于0.031 ng/mL。该方法用于实际样品分析,相对均方根差(n=11)不高于3.47%,质量控制结果与理论值的比值在95%~105%。
Five kinds of heavy metals(Cr,as,Cd,Hg and Pb)in coal gangue are determined by inductively coupled plasma mass spectrometry(ICP-MS)in HF∶H_(2)O_(2)∶NO_(2)Cl system.The contents of ^(52)Cr,^(75)As,^(114)Cd,^(202)Hg and ^(208)Pb are measured.Four internal standard materials,including Sc(^(45)Sc),Yttrium(^(89)Y),In(^(115)In)and Bi(^(209)Bi),are used to correct the matrix signals and restrain the drift.The accuracy of the method is verified through determining China's national soil standard samples(GBW07450,GBW07446,GBW07453,GBW07454)in Xinjiang,Inner Mongolia,Guangdong and Shaanxi.In the range of 0.1-100 ng·mL^(-1) for Cr,As,Cd,Hg and Pb,the linear correlation coefficients of calibration curves are all greater than 0.9995,and the detection limits of analytical methods are all less than 0.031 ng·mL^(-1).The relative root-mean-square deviation(n=11)is less than 3.47%,and the ratio of quality control results to theoretical values is in the range of 95%-105%as this method is used to analyze actual samples.
作者
张歌
文玉成
傅尧
刘菁钧
李晓星
狄雅肖
庞博
ZHANG Ge;WEN Yu-cheng;FU Yao;LIU Jing-jun;LI Xiao-xing;DI Ya-xiao;PANG Bo(Cleaner Production and Circular Economy Research Center,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Wuhan 430205,China)
出处
《现代化工》
CAS
CSCD
北大核心
2022年第10期242-246,共5页
Modern Chemical Industry
基金
国家自然科学基金项目(52174385)。
关键词
ICP-MS
高压密闭
煤矸石
国家严控5类重金属
ICP-MS
high pressure sealing
coal gangue
five heavy metals strictly controlled by the government
