摘要
在盐酸介质中 ,CTMAB存在下 ,芸香苷和Fe(Ⅲ )反应生成 2∶1蓝紫色络合物 ,λmax=6 2 0nm ,ε =4 .4 0× 10 4 L·mol- 1·cm- 1。铁含量在 0～ 2 0 μg/ 2 5ml范围内符合比耳定律 ,据此建立了一种测定烟草中铁含量的方法。
Rutin as a chromogenic reagent, reacts with Fe(Ⅲ) in a weakly acidic solution (0.014～0.032mol·L -1 HCl) and in the presence of CTMAB to form a stable bluish violet complex (mole ratio Fe∶R=1∶2) having it absorption maxima at 620nm. Beer′s law was obeyed in the range of 0～20μg of iron(Ⅲ) per 25ml of solution, with its apparent molar absorptivity of 4.40×10 4L·mol -1 ·cm -1 . A new absorptiophotometric method for the determination of iron in tobacco was proposed based on the facts mentioned above.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2002年第5期247-248,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
