【摘要】 建立了用偏最小二乘法（PLS）辅助分光光度法同时测定复合金属氧化物中Bi（Ⅲ）、V（Ⅴ）、Mo（Ⅵ）的分析方法。研究发现:在pH=4.0的醋酸—醋酸钠缓冲溶液中,Bi（Ⅲ）、V（Ⅴ）、Mo（Ⅵ）与二甲酚橙发生显色反应。Bi（Ⅲ）、V（Ⅴ）、Mo（Ⅵ）在各自最大吸收波长下遵守朗伯—比尔定律的线性范围为: Bi（Ⅲ） 1.540～6.932μg/mL ε₅₀₅=1.48×10⁴ ρ=0.9986 V（Ⅴ） 0.247～1.728μg/mL ε₅₂₀=2.18×10⁴ ρ=0.9997 Mo（Ⅵ） 4.294～17.175μg/mL ε₄₈₀=4.10×10³ ρ=0.9915 它成功地同时测定了模拟样品及催化剂中上述3种组分。更多还原

【Abstract】 A method is estiblished to determine content of Bi(III) ,V(V) and Mo(VI) in mixed metal-oxides by using the partial least square method and ultraviolet visble (UV-VIS ) spectrophotometry at the same time. In a pH = 4.0 CH3CH3COOH -CH3CH3COONa buffer solution, Bi(III),V(V) and Mo (VI) react with xylenol orange. The linear ranges conforming to the Beerlamb law at the maximum wavelength (max) are given below:Bi(III) 1. 540-6. 932 μg/mL e505 = 1. 48× 104 p=0. 9986V(V) 0.247-1.728 μg/mL e520 = 2. 18×104 p=0.9997Mo(VI) 4. 294-17- 175 μg/mL e480 = 4.10× 103 p=0. 9915The content of Bi(III),V(V) and Mo(VI) in the sample and catalysts have been determined successfully.更多还原