Abstract:In production of aluminum alloy, the addition of grain refiner can not only adjust the content of some elements in the alloy but also refine the grains. In order to accurately determine the impurity elements, a method for the determination of aluminum, iron and manganese in the grain refiner (titanium agent and titanium boron agent) was discussed by inductively coupled plasma atomic emission spectrometry (ICP-AES) with standard addition method. The sample was dissolved in sulphuric acid (1+1) and in the solution different amounts of aluminum, iron, manganese standard solution were added, it was then determined with the standard addition method software built in the ICP spectrometer. Through condition tests, it was determined that sulfuric acid (1+1) was adopted to dissolve samples and the spectral lines of 369.153 nm, 259.940 nm and 257.610 nm were selected as analytical lines of Al, Fe and Mn. Al, Fe and Mn in the grain refiner used in aluminum industry were determined under selected experimental conditions, so that the effect of large amounts of titanium matrix as well as high concentration sulfuric acid and spectral interference could be avoided effectively. The linear correlation coefficient (r) of the calibration curve was higher than 0.999 9. The proposed method has been applied to determine Al, Fe and Mn in titanium agent and titanium boron agent, whose results were consistent with those of other methods with relative standard deviation (RSD) less than 1.6% (n=10).
郑敏辉. 电感耦合等离子体原子发射光谱法测定铝工业用晶粒细化剂中铝铁锰[J]. 冶金分析, 2015, 35(2): 57-60.
ZHENG Min-hui. Determination of aluminum, iron and manganese in grain refiner used in aluminum industry by inductively coupled plasma atomic emission spectrometry. , 2015, 35(2): 57-60.