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本文研究了钛、钒共存时不经分离用分光光度法测定钛和钒的方法。利用形成TiO~(2+)-5-Br-PADAP-H_2O_2和VO_2~+-5-Br-PADAP-H_2O_2三元混配络合物,使有色络合物的最大吸收波长之差由二元(TiO~(2+)(VO_2~+)-5-Br-PADAP)的3nm扩大到三元的55nm。同时利用先加过氧化氢钒三元混配络合物形成速度十分慢的性质,可以在pH4.0,λ_(540nm)处测钛,利用钛在稍大的硫酸浓度中不显色的性质,在0.24M硫酸溶液中于λ_(595nm)处测钒。用本文研究所得的方法对两种合金钢标样中的钛和钒的含量进行了测定,得到满意的结果。
In this paper, titanium and vanadium without the separation of the spectrophotometric method for the determination of titanium and vanadium. The difference of the maximum absorption wavelength of the colored complex from the binary mixture of TiO 2 + 5-Br-PADAP-H 2 O 2 and VO 2 + -5-Br-PADAP-H 2 O 2 was determined by binary (TiO2 ~ (2 +) (VO_2 ~ +) - 5-Br-PADAP) extended to ternary 55nm. At the same time, the first-vanadium hydrogen peroxide ternary mixed complex formation rate is very slow. Titanium can be measured at pH4.0 and λ540nm. Titanium is not used because of its slight sulfuric acid concentration. , Vanadium was measured at λ_ (595 nm) in a 0.24 M sulfuric acid solution. With the method of this article, the content of titanium and vanadium in the two kinds of alloy steel samples were measured and the results were satisfactory.