东北轻合金加工厂中试室研究了利用苯基荧光酮测定铝合金中微量锡的方法。从络合物、试剂的吸收曲线,以及两者的吸光度的差值看认为测定波长以510nm处较为合适。试验的硫酸酸度区间为0.23—1.3N,在0.4—0.6N时吸光度几乎不变,结果采用0.5N硫酸,并以硫酸溶样来控制酸度。测 Northeastern University of Light Alloy Processing Laboratory Phenyl fluorone determination of trace amounts of tin in aluminum alloy method. From the difference between the absorption curve of the complex and the reagent, and the absorbance of the two, it is considered that the measurement wavelength is preferably 510 nm. The experimental acidity range of 0.23-1.3N sulfuric acid, 0.4-0.6N when the absorbance almost unchanged, the results using 0.5N sulfuric acid, and sulfuric acid sample to control the acidity. Measurement