光度法测定水样中铝  

PHOTOMETRIC DETERMINATION OF ALUMINUM IN WATER SAMPLES

作　　者：胡伟华[1] 孙宏志[1] 江天肃[1] 王巍[1] 和俊杰[1] 

机构地区：[1]长春理工大学纳米技术研究中心,长春130022

出　　处：《理化检验（化学分册）》2003年第8期460-461,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：研究了铝与对乙酰基偶氮胂(ASApA)显色反应,在pH 4.7的HOAc-NaOAc缓冲溶液中,Al3+与ASApA显色形成1:2络合物,最大吸收波长位于612 nm,ε-8.19×103L·mol-1·cm-1,铝量在0～2.8μg·ml-1范围内遵守比耳定律,用于水样中铝的测定,结果满意。In an HOAc-NaOAc buffer solution of pH 4. 7, aluminum(Ⅲ) reacts with p-acetylarsenazo (ASA-pA) to form a complex of mole ratio M : R= 1 : 2. The absorption maxima of this complex lies at the wavelength of 612nm, while the absorption maxima of the reagent at the wavelength of 542nm, giving a Δλ of 70nm The molar absorptivity of the colored complex was found to be 8. 19×103L · mol-1·cm-1. Beer's law holds in the range of 0 -2. 8μg of Al(Ⅲ) per ml of solution. This method has been applied satisfactorily to the determination of aluminum in water.

关 键 词：光度法 测定 水样 铝 对乙酰基偶氮胂 

分 类 号：X832[环境科学与工程—环境工程] X132