摘要
本文详细研究了新显色剂３，５－二溴苯基荧光酮的离解性质，利用光度法测定其离解常数ｐｋ１，ｐｋ２，ｐｋ３，ｐｋ４分别为１．８５，５．４２，１０．５１，１２．４４．与苯基荧光酮试剂比较，该试剂分子引入溴吸电子基团，使试剂的酸性增强，与金属离子显色反应灵敏度、选择性有很大的提高。
The dissociation properties of DBAPF in aqueous solution have been studied in this paper. Its dissociation constants have been determined by spectrophotometry. The measured results are 1.85, 5. 42, 10. 51, 12. 44 For pk1, pk2, pk3, pk4. Compared with phenyl, Because bromine electrophillic group have been introduced to in this reagent, It's acidity increased, the sensitivity of reacting with metal ions and selectivity raised remarkably.
关键词
二溴苯基荧光酮
分光光度法
离解常数
试剂
dibromo-4-amino benzyl-fluorescent ketone
sepectrophotometry
dissociation constant
