Determination of iron, manganese, chromium, nickel and magnesium in high-beryllium beryllium-aluminum alloy by inductively coupled plasma atomic emission spectrometry
WANG Zhiping1, WANG Qiao1, SUN Hongtao1, HU Yuanxia2
1. State Key Laboratory of Rare Metal Special Materials, Northwest Rare Metal Materials Research Institute Ningxia Co., Ltd.,Shizuishan 753000, China; 2. Huizhou Top Metal Materials Co., Ltd., Huizhou 516000, China
Abstract：High-beryllium beryllium-aluminum alloy is an important structural material. The contents of impurity elements will affect its structural properties. Therefore, it is necessary to determine the impurity contents accurately. The samples were decomposed by sulfuric acid and nitric acid. Fe 238.204 nm, Mn 257.610 nm, Cr 267.716 nm, Ni 216.555 nm and Mg 279.553 nm were selected as the analytical lines. The method of standard addition (MSA) was used to draw calibration curves to eliminate the influence of matrix effect. The contents of iron, manganese, chromium, nickel, and magnesium were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). Consequently, the analysis method of impurities in high-beryllium beryllium-aluminum alloy, including iron, manganese, chromium, nickel, and magnesium, was established. The linear correlation coefficients (r) of calibration curves of testing elements were all greater than 0.999 9. The limits of detection of elements were between 0.000 2% and 0.003 6% (mass fraction, similarly hereinafter). The limits of quantification were between 0.000 7% and 0.011 9%. The contents of iron, manganese, chromium, nickel, and magnesium in one high-beryllium beryllium-aluminum alloy sample were determined according to the experimental method. The relative standard deviations (RSD, n=11) of determination results were between 1.2% and 4.6%. The spiked recoveries were between 93% and 105%. Another sample was used to compare with glow discharge mass spectrometry (GD-MS), and the determination results were basically consistent.
王志萍, 王巧, 孙洪涛, 胡远霞. 电感耦合等离子体原子发射光谱法测定高铍铍铝合金中铁锰铬镍镁[J]. 冶金分析, 2021, 41(11): 78-83.
WANG Zhiping, WANG Qiao, SUN Hongtao, HU Yuanxia. Determination of iron, manganese, chromium, nickel and magnesium in high-beryllium beryllium-aluminum alloy by inductively coupled plasma atomic emission spectrometry. , 2021, 41(11): 78-83.
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