平台石墨炉原子吸收法测定高温镍基合金中砷  

DETERMINATION OF ARSENIC IN HIGH-TEMPERATURE NICKEL-BASE ALLOY BY PLATFORM GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY

作　　者：谢文兵[1] 姚金玉[1] 

机构地区：[1]中科院长春应化所国家电化学和光谱研究分析中心,130022

出　　处：《理化检验（化学分册）》1997年第3期107-108,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：研究了基体改进剂,灰化、原子化温度和共存元素的干扰.采用钯作基体改进剂和匹配基体镍后,提高了灵敏度,增强了抗干扰能力.在波长197.2nm处,用平台石墨炉原子吸收法直接测定了高温镍基合金中砷.方法特征量为88pg,检出限为0.27μg·g^(-1),相对标准偏差为3.1%～5.1%,回收率为85%～100%.The matrix modifier, the ashing or atomization temperature and interference experiment of arsenic are investigated. The result shows that the application of Pd-Ni as mixed matrix modifier can in-crease the sensitivity and eliminate the interference. The method has been applied to the determination of arsenic in high-temperature nickel-base alloy at 197. 2 nm by platform graphite furnace atomic absorption spectrometry. The characteristic mass is 88 pg, the detection limit is 0. 27 μg · g^(-1). The relative standard deviation is 3. 1%-5. 1%, the recovery is 85%-100%.

关 键 词：石墨炉原子吸收 高温 镍基合金 砷 分光光度分析 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TG115.335[金属学及工艺—金属材料]