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.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2000年第12期549-550,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
