使用一阶和二阶导数分光光度法同时测定玻璃、磷矿石和水泥中的铝和铁。

Simultaneous determination of aluminium and iron in glasses,phosphate rocks and cement using first- and second-derivative spectrophotometry.

作者信息

El-Sayed A Y

机构信息

Department of Chemistry, Faculty of Science, Al-Azhar University, Assiut, Egypt.

出版信息

Anal Bioanal Chem. 1996 Apr;355(1):29-33. doi: 10.1007/s0021663550029.

DOI:10.1007/s0021663550029

PMID:15045453

Abstract

First- and second-derivative spectrophoto-metric methods for the simultaneous determination of aluminium and iron in their mixtures are described. The methods are based on the colored complexes formed by aluminium and iron with hematoxylin in the presence of cetyltrimethylammonium bromide as a surfactant. The zero-crossing method has been utilized to measure the first- and second-derivative value of the derivative spectrum. Aluminium (0.05-1 microg ml(-1)) could be determined in the presence of iron (0.09-1.6 microg ml(-1)) and vice versa. The detection limits of aluminium and iron are 0.01 and 0.09 microg ml(-1), respectively in the first-derivative mode and 0.014 and 0.1 microg ml(-1) in the second-derivative mode. The proposed method has been applied to the simultaneous determination of aluminium and iron in glasses, phosphate rocks, cement and magnesite alloy.

摘要

描述了用于同时测定混合物中铝和铁的一阶和二阶导数分光光度法。这些方法基于铝和铁在十六烷基三甲基溴化铵作为表面活性剂存在下与苏木精形成的有色络合物。采用零交叉法测量导数光谱的一阶和二阶导数值。在铁（0.09 - 1.6 μg ml⁻¹）存在下可测定铝（0.05 - 1 μg ml⁻¹），反之亦然。在一阶导数模式下，铝和铁的检测限分别为0.01和0.09 μg ml⁻¹，在二阶导数模式下分别为0.014和0.1 μg ml⁻¹。所提出的方法已应用于玻璃、磷矿石、水泥和菱镁矿合金中铝和铁的同时测定。