摘要
合成了8种不对称变色酸双偶氮氟胂型新显色剂,并研究了它们与钍的显色反应,建立了最佳反应体系。试验发现由于引入了吸电子性极强的氟取代基,反应体系的酸度、选择性及灵敏度大为提高,是一组很好的测钍显色剂。
Eight new asymmetric aryl bisazo reagents based on chromotropic acid, having on one side diazotized with 5-fluoro-arsonic acid and on the other side diazotized with benzene substituted at 2,3,4 and (or) 6 position with auxiliary chromogenic groups, were synthesized, their color reactions with thorium(Ⅳ) were studied, and the optimum reaction conditions were found. Due to the introduction of the strongly electrophilic F-atom into the reagent molecule, its color reaction can be carried out in a more acidic medium, leading to improvements in selectivity and sensitivity. These new compounds are proved to be satisfactory color reagents for thorium.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2004年第8期435-437,444,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
