Al(Ⅲ)-铝试剂-聚乙烯醇-乙二胺显色体系的研究  

Spectrophotometric Study on the Colour System of Aluminium(Ⅲ)- Aluminon-Poly(Vinylalcohol)-Ethylenediamine

作　　者：黄德发[1] 李梅兰[1] 

机构地区：[1]湘潭师范学院化学系,湖南省湘潭市411201

出　　处：《光谱实验室》2003年第2期275-277,共3页Chinese Journal of Spectroscopy Laboratory

摘　　要：研究了在聚乙烯醇 ( PVA)存在下 ,Al( )与铝试剂及乙二胺的显色反应。实验表明 ,在 p H4 .0— 4 .5范围内 ,加入适量的乙二胺 ,对 Al( )和铝试剂的显色反应有明显的增敏作用。最大吸收波长为 5 35 nm,表观摩尔吸光系数为 1.1× 10 4 L· mol-1·cm-1,铝含量在 0 .5— 4 0 μg/ 2 5 m L范围内服从比耳定律 ,用于测定合成水样中的铝 ,结果令人满意。The colour reaction of aluminium(Ⅲ) with alumiuon,poly(vinylalcohol)(PVA) and ethylenediamine was studied.Between pH4.0-4.5 the sensitivity is increased by adding ethylenediamine in the presence of PVA.The apparent molar absorptivity is 1.1×104L·mol -1·cm -1 at 535nm.Beer's law is obeyed in the range of 0.5-40μg/25mL for aluminium.The proposed method has been applied to the determination of aluminium in synthetic water sample with satisfactory results.

关 键 词：显色体系 铝 铝试剂 聚乙烯醇 乙二胺 分光光度法 水样 分析 

分 类 号：O614.32[理学—无机化学] O661.1[理学—化学]