β-环糊精和阳离子表面活性剂对显色反应的协同作用及其应用研究——Cr(Ⅵ)-BPR-CPB-β-CD体系  

Studies on the Synergistic Effect of β-Cyclodextrin and Cationic Surfactant on the Chromogenic Reaction and Its Analytical Application——Cr (Ⅵ) - BPR-CPB-β-CD System

作　　者：郑启梅 戚文彬[2] 郑国洋[2] 

机构地区：[1]浙江师范大学化学系 [2]杭州大学化学系,杭州310028

出　　处：《冶金分析》1992年第2期7-9,共3页Metallurgical Analysis

基　　金：国家自然科学基金;浙江省自然科学基金资助的课题

摘　　要：Cr(Ⅵ)与溴邻苯三酚红(BPR)的反应极弱。本文详细研究了β-环糊精(β-CD)和溴化十六烷基吡啶(CPB)对Cr(Ⅵ)-BPR体系的协同作用。此体系的表观摩尔吸光系数ε＇650nm为7.80×10~4(比不加β-CD时增加119％)。Cr(Ⅵ)浓度在0～6.0μg/25ml范围内符合比尔定律,其线性回归方程式为y=0.18C,相关系数r≈1.000。已应用于测定电镀水中的铬(Ⅵ),与用二苯羰酰肼法所得结果比较,颇为满意,但其灵敏度大于后者。The reaction of Cr(Ⅵ)with bromopyrogallol red is very weak.In this paper,the synergist-ic effects of β-cyclodextrin (β-CD) and cetylpyridinium bromide (CPB) on Cr(Ⅵ)- bromopyrogallol red system was studied. The e'eso of the new system is calculated to be 7.80×104 which is increased 119% compared with that in the absence of β-CD. Beer's law is obeyed in the concentration range of 0-6.0 μg/25ml for Cr (Ⅵ) and its linear regression equation is y=0.18 C+0, r=1.000. The proposed method has been applied to determine Cr (Ⅵ) in electroplating waste water with satisfactory results compared with those obtained by diphenylcarbazide method. But the new method is more sensitive.

关 键 词：Β-环糊精 CSF 电镀废水 铬 测定 

分 类 号：X132[环境科学与工程—环境科学]