摘要
在CH2ClCOOH-NH4Ac-HClO4介质中,铬（Ⅲ）与偶氮胂-DBS形成物质的量比为1∶1的蓝色配合物,该配合物最大吸收波长为610 nm。方法测定铬的表观摩尔吸光系数ε610 nm=1.37×10^4L/（mol.cm）,铬（Ⅲ）质量浓度在0-1.0μg/mL范围内遵守比尔定律。本法用于茶叶样品中铬的测定,结果满意。
In a medium of CH2 ClCOOH-NH4 Ac-HClO4, chromium （Ⅲ） reacts with arsenazo-DBS to form a blue complex with a composition of 1：1（R：M）. The maximum absorption wavelength of the complex locates at 610 nm. The apparent molar absorptivity of the method for determing chromium is ε610 nm：1.37×10^4L/（mol·cm）. Beer＇s law is obeyed over the concentration range of 0-1.0μg/mL of chromium（HI）. The present method has been satisfactorily applied to determine chromium in tea samples.
出处
《湿法冶金》
CAS
2008年第1期60-62,共3页
Hydrometallurgy of China
