论文部分内容阅读
最后酸度为0.11—0.14mol/L的H_2SO_4介质中,在一定量Triton X-100存在下,双-(4-二甲胺苯基)-安替比林甲醇可与BiI_4~-生成组成比为Bi∶R=1∶2的三元络合物,其λ_(max)=650nm。铋量在0—100μg/25mL范围内遵守比尔定律,ε_(650)为1.27×10~4,100mg Fe(Ⅱ)和Al(Ⅲ),5mg Fe(Ⅲ),150μg Cr(Ⅲ),108μg Ca(Ⅱ),100μg Co(Ⅱ),50μg Se(Ⅳ),7μg Pb(Ⅱ),6μg Sn(Ⅳ)、W(Ⅵ)、Ni(Ⅱ)和Zn(Ⅱ),5μg Hg(Ⅱ)、V(Ⅴ)和Cr(Ⅵ),4.5μg Mo(Ⅵ),2μg Sb(Ⅲ)和Cd(Ⅱ)不干扰测定。本法用于纯铁中微量铋(0.04—0.08%)及纯铝人工合成液中铋(0.04—0.1%)的测定,效果较好。标准加料试验的回收率为90—107%,操作简便、快速。
In the presence of a certain amount of Triton X-100, the composition ratio of bis- (4-dimethylaminophenyl) -antipyrine to BiI_4 ~ was The ternary complex of Bi: R = 1: 2 had λ max (max) = 650 nm. Beer’s law was obeyed for bismuth in the range of 0-100μg / 25mL. The ε 650 was 1.27 × 10-4,100mg Fe (Ⅱ) and Al (Ⅲ), 5mg Fe Ⅲ, 150μg Cr Ⅲ and 108μg Ca (Ⅱ), Zn (Ⅱ), Zn (Ⅱ) and Zn (Ⅱ), 5μg Hg (Ⅱ), 50μg Se (Ⅳ) Ⅴ) and Cr (Ⅵ), 4.5μg Mo (Ⅵ), 2μg Sb (Ⅲ) and Cd (Ⅱ) did not interfere with the determination. This method for the determination of trace amounts of bismuth (0.04-0.08%) in pure iron and bismuth (0.04-0.1%) in pure aluminum synthetic solution, the better. Standard feed test recovery rate of 90-107%, easy to operate, fast.