摘要
合成了新荧光试剂 2 ,4 二羟基苯甲醛缩 4 氨基安替比林 (2 ,4 DHBAAP) ,并测定其结构。基于铝 (Ⅲ )与 2 ,4 DHBAAP CTMAB形成配合物 ,导致体系荧光增敏的特性 ,提出了一种测定微量铝的新荧光方法。在pH 4 .5～ 6 .0的乙酸铵缓冲溶液及CTMAB存在下 ,铝 (Ⅲ )与DHBAAP形成 1∶1的配合物。在λex λem =385 5 15nm处 ,体系产生的荧光增敏程度最大 ,铝量的线性范围为 0～ 15 0 μg·L-1,检出限为 0 .2 μg·L-1。方法用于水样中铝的测定 。
A new fluorescent reagent, 2,4-dihydroxybenzaldehyde-4-aminoantipyrine (abbreviated as DHBAAP) was synthesized by condensation of 2,4-dihydroxybenzaldehyde with 4-aminoantipyrine, and the product obtained was purified by recrystallization and its structure identified by IR-spectrometry and elementary analysis. It was found that in a buffer medium of ammonium acetate (pH 4.5～6.0) and in the presence of CTMAB, a complex, with a mole ratio of 1 to 1, is formed between DHBAAP and Al(Ⅲ), leading to a remarkable enhancement of fluorescence intensity of the reaction system. The fluorescence measurements were made at the wavelengths λ ex/λ em=385/515nm. Linear relationship between fluorescence intensity and concentration of aluminum(Ⅲ) was kept in the range of 0～150μg of Al(Ⅲ) per liter of solution, and a detection limit of 0.2μg·L -1 was found. Based on the above mentioned findings, a new fluorescent method for the determination of microamounts of aluminum was established, and satisfactory analytical results were obtained when the proposed method was applied to the analysis of water.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2002年第6期276-277,282,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
