摘要
利用偶氮胂Ⅲ与Cr2O72 - 的褪色反应, 对含Cr6 + 电镀废水中痕量铬( Ⅵ) 进行测定。结果表明, 在硝酸介质中褪色反应具有高的灵敏度, 反应产物的摩尔吸光系数为3 .9 ×106 L·mol - 1 ·cm - 1 。铬( Ⅵ) 含量在0 .0 ~40 .0 μg/L 范围内服从比耳定律。 该法用于测定电镀废水中的铬( Ⅵ) , 得到了满意的结果。
The fading reaction of arsenazo Ⅲ with was used to determine trace Cr(Ⅵ)in electroplating wastewater containing Cr(Ⅵ). The results show that the fading reaction has a high sensitivity in the medium of nitric acid, the molar absorptivity is 3.9×106 L·mol-1·cm-1, and Beer's law is obeyed for Cr(Ⅵ)in the range of 0.0~40.0 μg/L. Contents of Cr(Ⅵ)in electroplating wastewaters were determined with satisfactory results.
出处
《分析测试学报》
CAS
CSCD
2000年第1期56-57,58,共3页
Journal of Instrumental Analysis
关键词
分光光度法
偶氮胂
铬
电镀
废水
Spectrophotometry
Arsenazo Ⅲ
Cr(Ⅵ)
Electroplating
Wastewater