微波消解-石墨炉原子吸收光谱法测定土壤中微量钒  

Determination of trace vanadium in soil by microwave digestion-graphite furnace atomic absorption spectrometry

作　　者：侯明[1,2] 胡存杰[1] 靳丽波[1] 

机构地区：[1]桂林工学院材料与化学工程系,广西桂林541004 [2]广西环境工程与保护评价重点实验室,广西桂林541004

出　　处：《冶金分析》2009年第1期25-29,共5页Metallurgical Analysis

基　　金：广西自然科学基金资助项目(桂科自0728218;0679005);广西环境工程与保护评价重点实验室研究基金资助(桂科能0701k013);广西高校人才小高地建设"环境工程"创新团队资助计划项目(桂教人[2007]71号);广西壮族自治区教育创新人才基地资助项目

摘　　要：建立了微波消解一石墨炉原子吸收光谱法测定土壤中微量钒的方法。确定了微波消解样品和石墨炉原子吸收光谱测定钒的最佳条件。以HNO3-HClO4-HF（3：2：3，V／V）作为样品的消解液，采用两段消解方式进行样品微波消解，并以EDTA作为基体改进剂，在HNO3（φ=5％）介质中进行钒的测定。方法的检出限为0．72μg／L，线性范围0-300μg／L，相关系数r≥0．9985。方法用于土壤样品中钒的测定，相对标准偏差小于5％，回收率在98．2％～103．9％之间；有证参考物质的测定值与认定值相符。A method for determination of trace vanadium in soil by microwave digestion-graphite furnace atomic absorption spectrometry was developed . The microwave digestion precedure and determination conditions of graphite furnace atomic absorption spectrometry were optimized： two-step digestion mode was adopted with the mixed acid of HNO3-HClO4-HF （3 ： 2 ： 3,V/V） as digestion solution, EDTA as matrix modifier,and HNO3 （φ=5%） as acid medium. The detection limit of the proposed method is 0.72 μg/L, linearity range is 0--300 μg/L,and correlation coefficient is r≥ 0. 998 5. The proposed method has been applied to the determination of vanadium in soil samples with the relative standard deviation less than 5% and recovery of 98.2%--103.9%. For certified reference materials,the determination results are consistent with the certified values.

关 键 词：微波消解 石墨炉原子吸收光谱法 土壤 钒 

分 类 号：O657.31[理学—分析化学]