电热石墨消解火焰原子吸收光谱法测定废气中铜镍铬铅
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摘要
采用电热石墨消解仪消解滤筒采集的废气样品,以火焰原子吸收光谱法(FAAS)测定样品中铜、镍、铬、铅。对消解液的种类进行选择优化,使滤筒消解得更完全,且避免了前处理过程的吸附损失。铜、镍、铬的检出限均为0.006mg/m3,铅的检出限为0.025mg/m3,回收率为98.4～100%,精密度为1.7～3.4%(n=6)。该方法准确度高,快速高效,劳动强度低,适用于废气中重金属的测定。
Electric heating-graphite digestion was applied to digest the waste gas samples which were sampled with filter drums.Flame atomic absorption spectrometry(FAAS)was applied to determine the contents of copper,nickel,chromium and lead in pretreated samples.Digestion solutions was optimized for digesting the filter drums completely.On the other hand,the adsorption loss in the pretreat process was avoided.The detection limits were 0.006mg/m3 for Cu,Ni,and Cr,and it was 0.025mg/m3 for Pb.Returns-ratio varied from 98.4%to 100%,RSD ranged from 1.7%to 3.4%(n=6).The method has the advantages of accurate,fast,effective and lower work intensity.Therefore,the method is suitable to determine the contents of heavy metals in waste gas samples.
Electric heating-graphite digestion was applied to digest the waste gas samples which were sampled with filter drums.Flame atomic absorption spectrometry(FAAS)was applied to determine the contents of copper,nickel,chromium and lead in pretreated samples.Digestion solutions was optimized for digesting the filter drums completely.On the other hand,the adsorption loss in the pretreat process was avoided.The detection limits were 0.006mg/m3 for Cu,Ni,and Cr,and it was 0.025mg/m3 for Pb.Returns-ratio varied from 98.4%to 100%,RSD ranged from 1.7%to 3.4%(n=6).The method has the advantages of accurate,fast,effective and lower work intensity.Therefore,the method is suitable to determine the contents of heavy metals in waste gas samples.
引文
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[2]闻瑞梅.半导体工业废水、废气中砷、磷、硫、氟、氯及氮氧化物和重金属的综合治理[J].电子学报,2000,28(11):1-3,8.
[3]寇兴明,胡力玫,顾永祚.用分光光度法测定车间空气粉尘中的镍、铜和钴[J].四川大学学报,2001,38(4):602-604.
[4]顾志勇,陈京京,丁晓静,等.火焰原子吸收分光光度法与石墨炉原子吸收分光光度法测定环境空气中铅的对比研究[J].环境科学与管理,2011,36(10):128-130.
[5]王志杰,张俊玲.用ICP-AES测定废气中铅的前处理方法探讨[J].山东化工,2009,38(8):44-47.
[6]国家环境保护总局.空气和废气监测分析方法[M].第四版增补版.北京:中国环境科学出版社,2007:376-378.
[7]陈江,鲁斌礼,郑俊,等.火焰原子吸收光谱法测定废气中铅[J].理化检验-化学分册,2009,45(12):1401-1403.
[8]刘日威,张冠文,倪树标,等.新型石墨消解仪控制系统[J].现代科学仪器,2009,26(3):19-21.
[9]张维宇,张土秀,倪天增.程序控温石墨消解-原子荧光光谱法测定土壤中的硒[J].中国无机分析化学,2011,1(4):36-39.