石墨炉原子吸收法测定钨及氧化钨中微量铝  

FLAMELESS ATOMIC ABSORPTION DETERMINATION OF TRACE ALUMINUM IN TUNGSTEN AND TUNGSTEN OXIDE

作　　者：经幼苹[1] 

机构地区：[1]中国科学院化工冶金研究所,北京100080

出　　处：《光谱学与光谱分析》1990年第2期68-71,共4页Spectroscopy and Spectral Analysis

摘　　要：钨及氧化钨中微量铝的测定,一般采用将铝与基体钨沉淀分离,用分光光度法测定铝。随着石墨炉原子吸收光谱的发展,采用石墨炉原子吸收法测定铝灵敏度较高,但测定铝受基体的影响严重。近年来。Determination of trace aluminum in tungsten and tungsten oxide: usually aluminum is determinated by the spectrophotometric method after its separation from the tungsten. There is high sensitivity but serious matrix interference by graphite furnace atomic absorption spectrophotometric determination of aluminum.A method for direct determination of trace aluminum by graphite furnace atomic absorption spectroscopy in tungsten and tungsten oxide is given in this paper. The sample was decomposed with(NH_4)_3C_6H_5O_7, H_2O_2 and NH_4OH. Since the effect of tungsten matrix is equivalent to refractory metal carbide coating on the graphite tube surface, there was no interference even from 17 metals usually existed in samples. The sensitivity is 15 Pg/1%A. Relative standard deviation is less than 5%. The method can be used for the determination of 0.0x—0.00x% aluminum in tungsten and tungsten oxide.

关 键 词：石墨炉 原子吸收法 钨 氧化钨 铝 

分 类 号：O614.613[理学—无机化学]