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.
出处
《冶金分析》
EI
CAS
CSCD
北大核心
2000年第1期4-7,共4页
Metallurgical Analysis
关键词
钼同多酸
罗丹明B
缔合物
光化学分析
钼
光化学
Molybdenum isopoly-acid
Rhodamine B
Associated complex
Photochemical analysis
Molybdenum
