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近年来,资料报导用铬偶氮酚—KS分光光度法测定铝并应用于合金中铝的测定.后经作者研制及测定,表明该试剂及其与铝形成的络合物稳定性好,试剂底色浅,常见的伴生元素有较大的允许量.本文试验了铝与铬偶氮酚—KS形成稳定络合物的条件,拟定了分离伴生元素(钙、镁、锰及铁、钛等)以后,光度法测定铁锰矿石和白云石中低量铝的分析步骤.对上述样品中铝的测定结果,与其它分析方法结果一致.
In recent years, the data reported by the determination of aluminum with azocophenol-KS spectrophotometry and determination of aluminum in the alloy by the author after the development and determination, indicating that the reagent and its complex with aluminum and good stability, reagents The background color is shallow, and the common associated elements have a larger allowable amount.In this paper, the conditions for the formation of stable complexes between aluminum and chromium azo-phenols-KS were studied and the separation of associated elements (calcium, magnesium, manganese and iron, titanium, etc.) ), The spectrophotometric method for the determination of low amounts of aluminum in the iron-manganese ore and dolomite was performed, and the determination of aluminum in the above samples was consistent with the results of other analytical methods.