摘要
新有机试剂4-(6-溴-2-苯并噻唑偶氮)邻苯二酚(6-Br-BTAPC)与钛(Ⅳ)在 pH3.4的40%丙酮水溶液中发生高灵敏显色反应。形成的带负电荷的配合物的组成比为2:1表观稳定常数为3.7×10~9(25℃,μ0.1),λ_(max)为570nm,对比度(Δλ)为130nm,ε_(570)高达9.21×10~4L·mol^(-1)·cm^(-1)。建议了配合物的结构。在0~13μgTi(Ⅳ)/25ml 范围内遵从比耳定律。该法用于工业水和废水中痕量钛的分光光度测定,取得了满意的结果。
There is the high sensitive chromogenie reaction between 4-(6-bromo-2 benzothi- azolylazo)pyrocatechol,a new organic reagent,and Ti(Ⅳ)in the 40% acetone-aqueous so- lution at pH 3.4.The component ratio of the formed and negatively charged complex is 2:1 with the apparent stability constant 3.7×10~9(25℃,μ0.1),λ_(max) 570 nm,the contrast (Δλ)130 nm and ε_(570) 9.21×10~4L·mol^(-1)·cm^(-1).The structure of the complex was suggested. Beer's law is obeyed in the range of 0 to 13 μg of Ti(Ⅳ)per 25 ml.Satisfactory results have been achieved in applying the method to the spectrophotometric determination of trace titanium in industrial water and waste water.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1991年第5期581-584,共4页
Chinese Journal of Analytical Chemistry
关键词
钛
测定
分光光度法
6-Br-BTAPC
4-(6-Bromo-2-benzothiazolylazo) pyrocatechol
Titanium
Spcctrophotometry
Waste water