摘要
采用石墨炉原子吸收光谱仪,实现了铁镍基高温合金中痕量银、砷、铋、铅、硒、碲元素的直接测定,分析过程简便快捷,测定结果准确可靠。为了有效消除基体干扰,基于仪器纵向交流塞曼效应扣除背景这一优点,选用铁镍基标准样品建立工作曲线,并在该方法条件下考察了溶样酸和石墨炉温度制度条件。试验结果表明,各元素在其试验条件下均获得了较好的工作曲线,其线性相关系数R2均高于0.998;试验测得样品GBW01631中银、砷、铋、铅、硒、碲元素的回收率在94.4%~110%之间;样品GBW01632和GBW01634中各元素的相对标准偏差RSD（n=6）分别介于1.6%~9.6%和0.85%~6.4%之间,即试验获得了良好的准确度和精密度。
Direct determination of trace silver（ Ag）,arsenic（ As）,bismuth（ Bi）,lead（ Pb）,selenium（ Se） and tellurium（ Te）elements in iron-nickel-base superalloy was achieved by graphite furnace atomic absorption spectrometry（ GFAAS）.The analytical process is simple and reliable.In order to effectively eliminate the matrix interference,based on the advantage for superior longitudinal alternating Zeeman effect deduct background of instrument. Meanwhile,working curves were built with iron-nickel-base standard sample,then the dissolved sample acid and the conditions of graphite furnace temperature program were investigated under this method.The linear correlation coefficients R2 of working curves were greater than 0. 998.The recovery for Ag,As,Bi,Pb,Se,Te was between 94. 4% and 110% in iron-nickel-base superalloy sample GBW01631. The relative standard deviation RSD（ n= 6） of each element in sample GBW01632 and GBW01634 was between 1. 6% ~9. 6% and 0. 85% ~6. 4% respectively,that is to say,experiment obtained high accuracy and precision.
作者
张亮亮
雷亚宁
ZHANG Liang-liang;LEI Ya-ning(AVIC Metal Test Technology Company Limited, Xi＇an 713801, China)
出处
《化学试剂》
CAS
北大核心
2018年第4期348-352,共5页
Chemical Reagents
关键词
铁镍基高温合金
石墨炉原子吸收光谱法
石墨炉温度制度
iron-nickel-base superalloy
graphite furnace atomic absorption spectrometry method
graphite furnace temperature program
