水杨醛缩腺嘌呤席夫碱的合成及其光度法测定铜(Ⅱ)的研究  

Synthesis of salicylaldehyde-adenine schiff base and its application for the spectrophotometric determination of copper(Ⅱ)

作　　者：洪涛[1] 龙巍然[2] 陶晋飞[1] 刘鹏[1] 曹秋娥[1] 

机构地区：[1]云南大学化学科学与工程学院,云南昆明650091 [2]兴义民族师范学院化生系,贵州兴义562400

出　　处：《冶金分析》2012年第4期46-49,共4页Metallurgical Analysis

基　　金：云南省自然科学基金(2008CD066)资助

摘　　要：以水杨醛和腺嘌呤为原料,合成了一个新的席夫碱(水杨醛缩腺嘌呤席夫碱,SASB),并对其结构进行了鉴定。以该席夫碱为显色剂,在优化了反应条件后,建立了一个测定痕量Cu2+的新光度分析方法。方法在400nm处的表观摩尔吸光系数为7.68×104 L.mol-1·cm-1,线性范围为0.05～0.60μg/mL。常见离子都不干扰测定,加入2mL 10.0g/L NH4F溶液作为掩蔽剂时,Al 3+和Fe3+的允许量可分别提高到75倍和25倍。将方法用于铝合金中铜的测定,结果同原子吸收光谱法的测定值一致,相对标准偏差在2.5%以内。A new schiff base（salicylaldehyde-adenine schiff base,SASB） has been synthesized by the condensation reaction between salicylaldehyde and adenine.And its structure has been identified.With schiff base as color reagents,a new spectrophotometric method for the determination of trace Cu2＋ has been established after the conditions of the reaction between SASB and Cu2＋ was optimized.The linear range and apparent molar absorptivity at 400nm was 0.05-0.60 μg/mL and 7.68×104 L·mol-1·cm-1,respectively.The method,which was free from the interference of much common ions,could be used for the determination of copper in the presence of 75 times of Al3＋ and 25 times of Fe3＋ after 2 mL of 10.0 g/L NH4F was added as screening agent.The results for the determination of trace copper in aluminium alloys obtained by this method with the standard deviation of less than 2.5% was in agreement with that obtained by AAS.

关 键 词：水杨醛缩腺嘌呤席夫碱 铜(Ⅱ) 分光光度法 铝合金 

分 类 号：O657.32[理学—分析化学]