钽涂层石墨炉原子吸收法测定环境中微量钡的研究  

Determination of Trace Barium in Environmental Samples by Electric-heated AAS with Tantalum-coated Graphite Tube

作　　者：杨秋菊[1] 孔凡茂[2] 

机构地区：[1]淄博职业学院化学工程系,山东淄博255013 [2]淄博市产品质量监督检验所,山东淄博255033

出　　处：《山东化工》2008年第6期34-36,共3页Shandong Chemical Industry

摘　　要：建立了钽涂层石墨管原子吸收法测定钡的方法,硝酸镁作基体改进剂,有效地避免了碳化物的生成,提高了测定灵敏度,测定了土壤标样和环境水样中钡的含量。方法的出限为2.1×10-11g,对于14ng/mL钡的测定相对标准偏差为4.4%。A method was established for the determination of barium in environmental samples by graphite furnace atomicabsorption spectrometry. In the presence of matrix modifiermagnesium, the matrix interference was eliminated efficiently and when the graphitetube was coated with tantalum, the sensitivity was improved. The method has been used for the determination of trace barium in soil sample and environmental water sample. The detection limit for Ba is 2.1×10^-11g and the relative standard deviation is 4.4%.

关 键 词：钡 涂钽石墨管 电热原子吸收法 

分 类 号：O657.31[理学—分析化学]