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时间:2020-04-22
《火焰原子吸收法测定煤渣和煤质活性炭中铁、钙、镁、锌、铅-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、薛慧,等:火焰原子吸收法测定煤渣和煤质活性炭中铁、钙、镁、锌、铅27doi:10.3969/j.issn.1008-6145.2014.04.008盎火焰原子吸收法测定煤渣和煤质活性炭中铁、钙、镁、芊、铅薛慧,董宾(1.北京海光仪器有限公司,北京100015;2.北京神雾环境能源科技集团股份有限公司,北京102200)摘要建立了火焰原子吸收法测定煤渣和煤质活性炭中微量金属元素铁、钙、镁、锌、铅含量的方法。煤渣样品采用干灰化后消解,煤质活性炭样品采用稀酸提取进行处理。煤渣中铁、钙、镁元素用标准曲线法定量,活性炭中铁、锌、铅则采用标准加入法定量以减少基体干扰的影响。样品测定结果与文献报道相一
2、致,煤渣尤其是燃烧处理后的煤渣中微量元素含量较高,而煤质活性炭通过复杂工艺处理后,微量元素大大减少。样品中被测元素的加标回收率在88.5%-105.5%之间,测定结果的相对标准偏差小于2%=7),两类样品中6种元素的检出限分别为0.010,0.015,0.005,0.012,0.013,0.110mg/L。火焰原子吸收法测定微量元素准确度高、重现性好,适合煤渣和活性炭中微量金属元素的测定。关键词火焰原子吸收法;煤渣;煤质活性炭;铁;钙;镁;锌;铅中图分类号:0657.3文献标识码:A文章编号:1008-6145(2O14)04.0027-04DeterminationOfFe,Ca,Mg
3、,ZnandPbinCinderandActivatedCarbonbyFlameAtomicAbsorptionMethodXueHui,DongBin(1.BeijingHaiguangInstrumentCo.,Ltd.,Beijing100015,China;2.BeijingShenwuEnvironment&EnergyTechnologyCorp.Beijing102200.China)AbstractAmethodformeasurementofmetalmicroelementsincindersandactivatedcarbon,suchasFe,Ca,Mg,Zna
4、ndPbbyflameatomicabsorptionmethodwasestablished.Pretreatmentprocedurewasstudied.Cinderswastreatedwithdryashingandthendigested,activatedcarbonwastreatedwithacidextractionmethod.MetalmicroelementssuchasFe,CaandMgincinderweremeasuredusingstandardcurvemethod,whilemicroelementssuchasFe,ZnandPbinactiva
5、tedcarbonfromcoalweremeasuredbasedonstandardadditionmethod.inordertoreducetheinterferenceofthebasic.Resultsdetectedbythemethodwereinaccordancewithexistedreferences.Microelementscontentswerehigherincinders,especiallyafterburning.Incomparison,microelementsdroppeddramaticallyinactivatedcarbon,duetot
6、hecomplexprocessingprocedure.Recoveriesofeachelementrangedfrom88.5%to105.5%.andtherelativestandarddeviationwaslessthan2%(=7).Thedetectinglimitsofthesixelementswere0.010,0.015,0.005,0.012,0.013,O.110mg/Lrespectively,intwokindsofthespecimen.Itcanbeconcludedthattheflameatomicabsorptionmethodisaccura
7、te,convenient,itissuitableforthemeasurementofmetalmicroelementsincindersandactivatedcarbon.Keywordsflameatomicabsorptionmethod;cinder;activatedcarbonfromcoal;Fe;Ca;Mg;Zn;Pb煤是我国工业生产和居民生活的主要能源,而水处理,能有效去除气体与液体中的杂质和污染物,煤渣是
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