摘要
报道了新息夫碱试剂水杨醛缩－５－碘－８－氨基喹啉（ＳＡＩＡＱ）的合成。用元素分析、红外光谱法确定了其结构。测定了ＳＡＩＡＱ的酸度常数Ｋａ１＝２．４０×１０－４，Ｋａ２＝２．９８×１０－９。在ｐＨ３．５０～５．００范围内ＳＡＩＡＱ与Ｇａ３＋形成稳定的荧光螯合物，且在λｅｘ／λｅｍ＝４２８ｎｍ／５４０ｎｍ产生强烈荧光。其荧光强度与Ｇａ３＋的浓度在１．５μｇ／Ｌ～２６０μｇ／Ｌ范围内呈线性关系，检出限１．５μｇ／Ｌ，考察了共存离子的影响，选择性高。已应用于煤渣中痕量镓的分析。
A new schiff buse,salicylidene5-iodo-8-aminoquinolne(SAIAQ),was prepared and its characteristics determined.The optimal conditions for the fluorescent complex formation of SAIAQ with gallium(Ⅲ) were established .The excitation and emission wave lengths were 428nm and 540nm respectively,the molar ratio of Ga(Ⅲ) to SAIAQ was determined to be 1∶2.The quontum yield was 0.72at pH 3.50～5.00.The proposed method was used for the determination of gallium in coal cinder samples in the range of 1.5～260μg/L.
出处
《分析试验室》
CAS
CSCD
1998年第2期39-42,共4页
Chinese Journal of Analysis Laboratory
关键词
水杨醛缩
碘
氨基喹啉
合成
镓
煤渣
分析
Salicylidene5-iodo-8-aminoquinoline
synthesis
spectrofluorimetry
gallium
