钼同多酸的光化学研究及分析应用  

Photochemical Study on the Molybdenum Isopoly-Acid and Its Analytical Application

作　　者：吴群娣[1] 王盛棉[1] 蒋治良[1] 

机构地区：[1]广西师范大学计算分析测试中心,桂林541004

出　　处：《冶金分析》2000年第1期4-7,共4页Metallurgical Analysis

摘　　要：在002mol/LH2SO440%乙醇介质中及紫外光照射条件下,钼同多酸光还原生成钼多蓝(λmax=760nm);于相同条件,有PVA存在,钼多蓝和RDB反应,生成稳定的红紫色缔合物,最佳条件:在002mol/LH2SO4-20×10-5mol/LRDB-005%PVA-40%乙醇介质中及光照10min。钼浓度在10-7～10×10-5mol/L范围内与吸光度呈线性关系,据此建立了一个测定钢中微量钼的光化学分析新方法。Under the condition of 0 02 mol/L H 2SO 4-4% alcohol and irradiation of UV-light, molybdenum isopoly-acid was reduced to form molybdenum poly blue(λ max =760nm). In the same condition, but existing polyvinyl alcohol(PVA), this molybdenum poly blue reacted with rhodamine B(RDB) to form a stable reddish purple associated complex. A new photochemical method for the determination of 1 0×10 -7 -1 0×10 -5 mol/L molybdenum has been proposed. The optimal condition was in the medium of 0 02mol/L H 2SO 4-2 0×10 -5 mol/L RDB-0 05% PVA-4% alcohol and irradiated for 10min. This method has been applied to determine micro molybdenum in steel with satisfactory results.

关 键 词：钼同多酸 罗丹明B 缔合物 光化学分析 钼 光化学 

分 类 号：O657.32[理学—分析化学]