二安替比林基—(2—溴)苯基甲烷与铬(Ⅵ)的显色反应研究及应用  

STUDY ON COLOUR REACTION OF CHROMIUM(Ⅵ) WTTH DIANTIRYRYL-(2-BROMO)-PHENYLMETHANE(DAoBM) AND ITS ANALYTICAL APPLICATIONS

作　　者：龙莉[1] 徐其享[1] 杨文英[2] 

机构地区：[1]云南大学化学系,650091 [2]云南民族学院化学系,650031

出　　处：《干旱环境监测》1997年第1期18-20,共3页Arid Environmental Monitoring

摘　　要：研究了二安替比林基—（2—漠）本基甲烷（DAOBM）与铬（Ⅵ）的显色反应的最佳条件．在Mn（Ⅱ）的诱导作用下，其摩尔吸光系数可达1．82×105L·mol-1·cm－1。显色反应在吐温—80存在下的磷酸介质中进行，铬量在1．0～60μg／25ml范围内符合比耳定律。该方法稳定性好．灵敏度高，具有很好的选择性．可用于电镀废水及处理废水中微量铬的测定．结果满意。China J. Arid Environ. Monitoring, 1997; 11 (1): 18 -20In this paper, the colour reaction of chromium(Ⅵ)with diantipyryl- (2 - Bromo ) - phenylmethane(DAoBM) and its optimum conditions have been investi-gated. A method for the spectrophotometric determina-tion of chromium(Ⅵ) with DAoBM has been developed.Ih tha preseoce of Mn (Ⅱ), tween 80 and phoophoricacid, the molar absorptivity of the complex is found to be1. 82 × 105L' mol-1. cm-1. Beer's law is obeyed overthe concentration range 1. 0～6. 0μg/25ml of Cr (Ⅵ).The method can be applied to determinating Cr (Ⅵ) inwaste water.

关 键 词：二安替比林基 苯基甲烷 铬 分光光度法 显色反应 

分 类 号：O643.19[理学—物理化学] X703[理学—化学]