4,5-二溴邻硝基苯基萤光酮(DBON-PF)分光光度法测定铝  

Spectro Photometric Determination of Aluminium with 4,5-Di-Bromo-2-Nitro-Phenylfluorone(DBON-PF)

作　　者：敖登高娃[1] 赵玉梅[1] 赛音[1] 刘惠民[1] 

机构地区：[1]内蒙古大学化学系

出　　处：《广东工业大学学报》1997年第S1期47-50,共4页Journal of Guangdong University of Technology

摘　　要：研究了在阳离子表面活性剂ＴＭＡＢ存在下，铝与４，５－二溴邻硝基苯基萤光酮（ＤＢＯＮ－ＰＦ）显色反应。实验结果表明，在ｐＨ５．０～５．６的六次甲基四胺－盐酸的缓冲溶液中，铝与ＤＢＯＮ－ＰＦ形成１∶２配合物，其最大吸收波长为５７９ｎｍ，摩尔吸光系数为１．５×１０５Ｌ·ｍｏｌ－１，铝含量在０～４μｇ／２５ｍＬ范围内符合比耳定律。当体系引入一定量的掩蔽剂时，提高了方法的选择性。方法简便，快速，灵敏度高，用于铜合金，合金钢中铝的测定，结果满意。The complex of aluminium and DBON-PF is formed in the presence of CTMAB.The spectrophotometric characteristic complex is investigated in the buffer solution of hexamethylene-tetramine-hydrocholoric acid(pH is between 5.0 and 5.6).The Al-DBON-PF-CTMAB complex has a maximum absorption wavelength at 579nm.The apparent molar absorptivity is 1.5×10 5L·mol -1 ·cm -1 .Beer′s law is obeyed in the range from 0 to 4μg/25mL for Al 3+ .It is estimated that the molar ratio of Al to DBON-PF in the complex is 1∶2.This method is used to determine Al Content in alley copper and alloy iron with satisfactory results.

关 键 词：铝 4.5-二溴邻硝基苯基萤光酮 分光光度法 

分 类 号：O657.32[理学—分析化学]