溴化十六烷基三甲基铵增敏光度法测定定影废液中的银  

DETERMINATION OF SILVER IN FIXER WASTE BY CTMAB SENSITIZED SEPECTROPHOTOMETRY

作　　者：杜娟[1] 

机构地区：[1]襄樊学院化学与生物科学系,襄樊441053

出　　处：《化学分析计量》2005年第3期54-56,共3页Chemical Analysis And Meterage

摘　　要：在pH=6.86时,Ag+与二甲酚橙(XO)、表面活性剂溴化十六烷基三甲基铵(CTMAB)发生显色反应,Ag+-XO-CTMAB三元配合物的最大吸收波长为594nm,表观摩尔吸光系数为2.08×106L/(mol·cm),Ag+含量在0.0～50.0μg/(25mL)内服从比耳定律。将该法用于定影废液中微量Ag+的测定,回收率为96.7%～100.8%。The conditions of color reaction of Ag+ with XO in the presence of surface-active agent CTMAB were studied. It was found that Ag+ reacted with XO to form a stationary complex in the presence of CTMAB with pH of 6.8. The maximum absorption wavelenth was 594 nm, and the sensitivity was increased obviously, the molar absorptivity of the complex was 2.08×10 6 L/(mol·cm). Beer′s law was obeyed for the content of Ag+ in the range of 0.0～50.0 μg/(25 mL). The method was used to determine micro amount of silver in fixer waste, and the recoveries were 96.7%～100.8%。

关 键 词：溴化十六烷基三甲基铵 定影废液 光度法测定 表观摩尔吸光系数 增敏 AG^+ 最大吸收波长 表面活性剂 三元配合物 二甲酚橙 显色反应 比耳定律 银 回收率 

分 类 号：O614.242[理学—无机化学] TB8[理学—化学]