BTAMoPACA与Fe(Ⅲ)、Al(Ⅲ)显色反应及双波长标准加入法同时测定铁铝的研究  

Simultaneous Determination of Iron and Aluminium by Dual Wavelength Standard Addition Method

作　　者：张学军[1] 徐大军[1] 孙晓红[2] 夏心泉[1] 

机构地区：[1]沈阳化工学院应用化学系,辽宁沈阳110021 [2]上海宝钢普莱克斯实用气体有限公司,上海200941

出　　处：《沈阳化工学院学报》2002年第3期198-201,共4页Journal of Shenyang Institute of Chemical Technolgy

摘　　要：在 pH5 .9的邻苯二甲酸氢钾 氢氧化钠缓冲体系中 ,在CTMAB的存在下 ,Fe(Ⅲ )和Al(Ⅲ )与BTAMoPACA形成最大吸收分别为 6 70nm和 6 90nm的有色络合物 ,吸收光谱严重重叠 .采用双波长标准加入法对该混合显色体系进行研究 ,建立铁、铝同时测定的新方法 ,应用于硅砖中痕量铁。Iron and aluminium can form colored complexes with a new reagent BTAMoPACA in weak acidic medium and in the presence of CTMAB. Their complexes have maximum absorbance at the wavelength 670 nm and 690 nm respectively, but their absorption spectra overlap each other seriously. A new method simultaneous determination of trace amounts of iron and aluminium without seperation is proposed with dual wavelength standard additions in this paper, and has been applied to the simultaneous determination of trace amounts of iron and aluminium in standard sample, the satisfactory results are obtained.

关 键 词：BTAMoPACA 显色反应 铁离子 铝离子 双波长标准加入法 同时测定 铁 铝 研究 

分 类 号：O657.31[理学—分析化学] O614.81[理学—化学]