摘要
研究了DBM 偶氮羧胂与锆的显色反应体系 ,并应用于吸光光度法测定微量锆。DBM 偶氮羧胂与锆形成紫红色水溶性的络合物 ,最大吸收波长在 645nm。锆含量在 0 3 0 μg/2 5ml范围内符合比耳定律 ,表观摩尔吸光系数为 3 .4× 10 4 L·mol- 1·cm- 1,络合物的络合比为 1∶2。DBM 偶氮羧胂与锆的显色反应体系的稳定性及重现性较好 ,有较好的选择性。直接用于实际样品的测定 ,结果较好。
In a solution of 0.2mol·L -1 hydrochloric acid a reddish violet complex is formed by the reaction of zirconium(Ⅳ) with DBM carboxyarsenazo. Its absorption maxima is at 645nm. Beer′s law is obeyed in the range of 0~30μg/25ml of Zr(Ⅳ). The molar absorptivity is 3.0×10 4L·mol -1 ·cm -1 . The mole ratio of Zr(Ⅳ) to DBM carboxyarsenazo is 1∶2. This method has been applied to the determination of zirconium(Ⅳ) in alloy steel and in Al 2O 3 refractory material.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2001年第9期409-410,413,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
