摘要
研究了显色剂三溴偶氮胂与锆的显色反应。在1．2mol·L^-1 HCI溶液中，锆与三溴偶氮胂反应形成蓝色配合物，最大吸收波长为640nm，表观摩尔吸光系数为5．0×10^4L·mol^-1·cm^-1。25mL溶液中，锆含量在0～20μg范围内符合比尔定律。将该方法用于对苯二甲酸中微量锆的直接测定，相对标准偏差为1．6％～3．7％，加标回收率为98％～102％，结果令人满意。
The chromogenic reaction between tribromoarsenazo and zirconium was studied. In 1.2 mol · L^-1 HCl solution, zirconium reacted with tribromoarsenazo to form a blue complex which exhibited an absorption maximum at 640 nm with a apparent molar absorptivity of 5.0 × 10^4 L · mol^-1· cm^-1. Beerrs law was obeyed in the range of 0-20 μg zirconium in 25 mL solution. This method had been applied to determine micro zirconium in terephthalic acid with RSD of 1.6-3.7% and recovery of 98-102%. The results was satisfatory.
出处
《化学与生物工程》
CAS
2009年第4期74-75,共2页
Chemistry & Bioengineering
关键词
锆
三溴偶氮胂
对苯二甲酸
分光光度法
zirconium
tribromoarsenazo
terephthalic acid
spectrophotometry
