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本文介绍不分离干扰元素在 pH5.7酸度下,用 Zn-EDTA(或抗坏血酸)掩蔽 Fe(Ⅲ),用 CAS 光度法测定硅铁中铝量。着重介绍 Zn-EDTA 加入量及其对显色液稳定性影响试验和铝允许量试验。本方法可用于硅铁中铝量在0.05～3.00%的分析测定。
In this paper, Fe (Ⅲ) was masked with Zn-EDTA (or ascorbic acid) at pH 5.7 without separation of interfering elements, and the amount of aluminum in ferrosilicon was determined by CAS spectrophotometry. The introduction of Zn-EDTA dosage and its influence on the stability of the color liquid and aluminum tolerance test. The method can be used for ferrosilicon in the amount of 0.05 ~ 3.00% of the analytical determination.