石墨炉原子吸收光谱直接法测定镍基高温合金中镉含量  

Direct determination of cadmium content in nickel-based alloys by graphite furnace atomic absorption spectroscopy

作　　者：颜京 李贺福 李燕昌 武玉杰 YAN Jing;LI Hefu;LI Yanchang;WU Yujie(AECC Beijing Institute of Aeronautical materials,Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation,Aviation Key Laboratory of Science and Technology on Materials Testing and Evaluation,Key Laboratory of Aeronautical Materials Testing and Evaluation,Aero Engine Corporation of China,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院,航空材料检测与评价北京市重点实验室,材料检测与评价航空科技重点实验室,中国航空发动机集团材料检测与评价重点实验室,北京100095

出　　处：《化学分析计量》2024年第6期88-93,共6页Chemical Analysis And Meterage

摘　　要：采用硝酸、氢氟酸溶解镍基高温合金试样,建立石墨炉原子吸收光谱法测定镍基高温合金中镉元素含量。采用灰化温度500℃,原子化温度1200℃,对镍基高温合金试样进行测定。镉元素质量分数在0.1~20.0μg/g范围内与其吸光度线性关系良好,相关系数均大于0.99。通过标准物质对照和加标回收试验验证方法准确度,方法检出限和定量限分别为0.0029、0.01μg/g,样品加标回收率为91.8%~107.8%,相对标准偏差小于4.5%(n=11)。该方法灵敏度高,准确性好,适用于镍基高温合金中镉元素的质量控制。A graphite furnace atomic absorption spectrometry method was established to determine the content of cadmium in nickel-based superalloy,while the samples were dissolved by nitric acid and hydrofluoric acid.The sample of nickel-based superalloy was measured by ashing temperature of 500℃and atomization temperature of 1200℃.The mass fraction of cadmium element had a good linear relationship with its absorbance in the range of 0.1-20.0μg/g,and the correlation coefficient was more than 0.99.The accuracy and precision of the method were verified by standard reference and standard addition recovery tests.The detection limits and quantification limit of the method were 0.0029 and 0.01μg/g,respectively.The recoveries of spiked samples were from 91.8%to 107.8%,and the relative standard deviation was less than 4.5%(n=11).The method has high sensitivity and accuracy,and is suitable for the quality control of cadmium in nickel-based superalloys.

关 键 词：石墨炉原子吸收光谱法 镍基高温合金 镉含量 

分 类 号：O657.3[理学—分析化学]