微波消解-石墨炉原子吸收法测定大米中的痕量钒  

Determination of trace vanadiumin in rice by microwave digestion and graphite furnace atomic absorption spectrometry

作　　者：周玮[1,2,3] 范菲菲[1,2,3] 朱大雁[1,2,3] 朱淮武[4] 

机构地区：[1]贵州省农业科学院土壤肥料研究所,贵州贵阳550025 [2]贵州省农业科学院农业资源与环境检测中心,贵州贵阳550025 [3]农业部贵州耕地保育与农业环境科学观测试验站,贵州贵阳550025 [4]贵州师范大学化学与材料科学学院,贵州贵阳550001

出　　处：《贵州师范大学学报（自然科学版）》2013年第4期71-73,103,共4页Journal of Guizhou Normal University：Natural Sciences

摘　　要：用微波消解-石墨炉原子吸收光谱法测定大米样品中痕量钒。研究了不同微波消化体系对大米钒测定结果的影响,确定了微波消解样品和石墨炉原子吸收测定钒的最佳条件。结果表明,采用四段微波消解方式,以HNO3-HCl-H2O2(3∶1∶1)为消解液、EDTA为基体改进剂,进行钒测定可获得满意的结果。方法的检出限为0.63μg/L,线性范围0～300μg/L,相关系数R=0.997 8。该法简便快速,具有较高的灵敏度和准确度,用于大米样中钒的测定,回收率在101.2%～105.8%,标准试样结果平均相对偏差在10%以内。A method for determination of trace vanadium in rice samples by graphite furnace atomic ab- sorption spectrometry and microwave digestedion is developed. The optimum conditions of digestion of rice samples and graphite furnace atomic absorption are experimented. Determination of trace vanadium is satisfied by four-step digestion mode, with HNOa-HC1-H202 （3： 1：1 ） as digestion solution, EDTA as matrix modifier. The detection limit is 0.63μg/L, linearity range is from 01μg/L to 300μg/L, the correlation coefficient-R is 0.9978. The recovery rate is 101.2% to 105.8%, and the average relative deviation of standard sample is within 10%. The method is accurate and convenient.

关 键 词：钒 微波消解 石墨炉原子吸收光谱 大米 

分 类 号：O6-33[理学—化学]