新型显色剂2-(H-酸偶氮)-4,5-二硝基苯酚测定铁(Ⅲ)  

Determination of Iron(Ⅲ) with the New Chromogenic Reagent 2-(H-Acidazo)-4,5-Dinitrophenol

作　　者：殷国健[1] 马莎[1] 杨光宇[1] 王林[1] 尹家元[1] 

机构地区：[1]云南大学化学系,昆明市650091

出　　处：《光谱实验室》2000年第4期456-458,共3页Chinese Journal of Spectroscopy Laboratory

摘　　要：本文研究了新试剂 2 - ( H-酸偶氮 ) - 4 ,5-二硝基苯酚 ( HADNP)与铁的显色反应 ,在 p H5.3的 Na Ac-HAc缓冲介质中 ,HADNP与 Fe( )生成 3∶ 1稳定紫色配合物 ,λmax=590 nm,ε=1.70× 10 4 L·mol-1·cm-1,铁含量在 0— 1.0 mg/ L范围内符合比耳定律 ,该法用于自来水样中总铁的测定 。The color reaction of 2 (H acidazo) 4,5 dinitrophenol(HADNP) with iron(Ⅲ) was studied. In pH5.3 NaAc HAc buffer solution, HADNP can reacts with iron(Ⅲ) to form 3∶1 purpureal stable complex. The molar absorptivity is 1.7×10 4L·mol -1 ·cm -1 at 590nm. Beer's law is obeyed in the range of 0—1.0mg/L for iron (Ⅲ). This method can be applied to the determination of iron(Ⅲ) in tap water with satisfactory results.

关 键 词：铁 分光光度法 自来水 测定 HADNP 显色反应 

分 类 号：TU991.2[建筑科学—市政工程] O614.811[理学—无机化学]