掺氧空气-乙炔火焰原子吸收光谱法测定地质样品中痕量镱  

FAAS DETERMINATION OF YTTERBIUM IN GEOLOGICAL SAMPLES WITH OXYGEN MIXED AIR-ACETYLENE FLAME

作　　者：吴少尉[1,2] 陈文武[3] 吴吉炎[1] 金萍[3] 汤志勇[3] 金泽祥[3] 

机构地区：[1]湖北民族学院化学与环境工程学院 [2]中国地质大学材料科学与化学工程学院,湖北武汉430074 [3]中国地质大学材料科学与化学工程学院

出　　处：《理化检验（化学分册）》2005年第1期23-25,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家地质调查局科技项目(DK0003048)

摘　　要：提出掺氧空气-乙炔火焰原子吸收光谱法测定地质样品中痕量镱的新方法。使用磺基水杨酸作保护剂消除铝对镱的挥发原子化干扰,KC1作消电离剂消除镱的电离干扰。方法的检出限为0.0042mg·L-1。应用于测定地质标准样品中痕量镱,结果与标准值相符,对GBW07302试样测定8次,RSD为5.41%。Oxygen-mixed air-acetylene flame was used in the FAAS determination of ytterbium in geological sample to obtain high temperature flame Furthermore, sulfosalicylic acid was added as a protecting agent to eliminate the interference of aluminum to the atomization volality of ytterbium, and potassium chloride was added to eliminate the ionization interference of ytterbium. By the above mentioned modifications, a detection limit (k = 3) of 0. 004 2 mg·L-1 of Yb was obtained. In the application of this modified method to the analysis of a CRM (GBW 07302), the results obtained were in consistency with the certified value. RSD of 5. 41% was obtained from the analytical results of 8 determinations of the same CRM.

关 键 词：原子吸收光谱法 掺氧空气-乙炔火焰 地质样品 镱 

分 类 号：O657.31[理学—分析化学] O614.232[理学—化学]