非离子型微乳液对Pb(Ⅱ)-2-(5-溴-吡啶偶氮)-5-二乙氨基酚显色反应的增敏作用  

SENSITIZATION EFFECT OF NON-IONIC MICROEMULSOID ON THE COLOR REACTION OF Pb(Ⅱ) WITH 5-Br-PADAP

作　　者：王明[1] 

机构地区：[1]四川省天然气化工研究院,成都610212

出　　处：《理化检验（化学分册）》2000年第12期549-550,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：以含水量 90 %的 O/W乳化剂 OP/正丁醇 /正庚烷 /水非离子型微乳液为介质 ,以 5-Br- PADAP为显色剂 ,进行了 Pb( )的吸光光度测定。其最大吸收波长λmax为 540 nm,表观摩尔吸光系数达 1 .0 7× 1 0 5,与相应的胶束体系比较 ,测定灵敏度提高了近 1倍 ,Pb( )在 0～ 1 5μg/2 5ml范围内符合比耳定律。用于废水中微量铅的测定 。In a medium of a microemulsoid system composing of OP/ n C 4H 9OH/ n C 7H 16 /H 2O, in which the water content is 90%, the color reaction of Pb(Ⅱ) with 5 Br PADAP achieved a high sensitivity. The molar absorptivity attained a value of 1.07×10 5L·mol -1 ·cm -1 , which is about one fold higher than the conventional micellar system. Beer′s law is obeyed in the range of 0~15μg of Pb(Ⅱ) per 25ml of solution. The proposed method has been successfully used in the determination of trace amounts of lead in waste water.

关 键 词：铅 微乳液 5-BR-PADAP 显色反应 废水 测定 增敏 

分 类 号：X132[环境科学与工程—环境科学] X832.02