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研究了利用 5 Br PADAP作显色剂 ,乳化剂OP作增溶增敏剂 ,导数分光光度法测定铝及铝合金中微量锰的适宜条件。经对纯铝及铝合金国家标准样品进行分析 ,相对标准偏差RSD≤ 1 2 % (0 0 0 0 4 %Mn) ,标准加入回收率在 97%～ 1 0 3%之间。
The suitable conditions for the determination of trace manganese in aluminum and aluminum alloy by using 5 Br PADAP as color former, emulsifier OP as sensitizer and derivative spectrophotometry were studied. After analyzing the national standard samples of pure aluminum and aluminum alloy, the relative standard deviations (RSDs) were less than 1 2% (0 0 0 0 4% Mn) and the standard recoveries were between 97% and 103%.