【摘要】 在0.04～0.16mol/LHClO₄介质中,Bi与二溴羧基偶氮胂发生显色反应,生成1:2的蓝色络合物,λ_max=625nm,ε=7.2×10⁴L·mol^-1·cm^-1,Bi量在0～0.5μg/ml范围内符合比耳定律。所拟方法已用于检测陶瓷电容钛酸铋烧结物中游离Bi₂O₃。更多还原

【Abstract】 Microamounts of bismuth react with dibromocarboxyarsenazo to form a blue complex in 0. 04 ~0. 16mol/L HC1O4. The maximum absorption is at 625 nm, the molar absorptivity being 7. 2 ×104. Beer’s law is obeyed in the range 0 - 0. 5μg/ml. The method has been applied to- the determination of uncombined bismuth oxide in bismuth titanate sinters with satisfactory results.更多还原