2-(5-溴-吡啶偶氮)-5-二乙氨基苯酚改性硅胶富集石墨炉原子吸收光谱法测定痕量铟  

Enrichment with silica gel modified with 2-(5-bromopyridylazo)-5-diethylaminophenol and graphite furnace atomic absorption spectrometric determination of trace indium

作　　者：欧阳开[1] 龚琦[1] 洪欣[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《冶金分析》2007年第8期47-49,共3页Metallurgical Analysis

摘　　要：制备了2-(5-溴-吡啶偶氮)-5-二乙氨基苯酚改性硅胶(5-Br-PADAP-SG),研究了将此硅胶用于富集水样及人工模拟矿渣样中的痕量In(Ⅲ)的条件。结果表明,在pH4时,5-Br-PADAP-SG能定量富集In(Ⅲ),其饱和吸附量为109μg/g,吸附的In(Ⅲ)可被1.0 mol/L的HNO3定量洗脱和用石墨炉原子吸收光谱法测定。分别对管网水样,人工合成矿渣样中的In(Ⅲ)进行了富集和测定,平均回收率为96%。The silica gel modified with 2-（5-bromo-pyridylazo）-5-diethylaminophenol （5-Br-PADAP-SG）was prepared and used to enrich trace In（Ⅲ）in water and simulative mineral slag samples. The enrichment factors were investigated. The results showed that the 5-Br-PADAP-SG could enrich In（Ⅲ） quantitatively at pH4 and its saturated capacity found was 109 μg/g. In（Ⅲ） adsorbed on 5-Br-PADAP SG could be eluted quantitatively by 1.0 mol/L HNO3 and determined by graphite furnace atomic absorption spectrometry. The method has been used for the enrichment and determination of trace In（Ⅲ）in water and simulative mineral slag samples, giving the average recovery of 96 %.

关 键 词：铟 2-(5-溴-吡啶偶氮)-5二乙氨基苯酚 硅胶 吸附柱 富集 石墨炉原子吸收光谱法 

分 类 号：O657.31[理学—分析化学]