摘要
通过原子吸收和X-射线衍射分析证明,加入钯镁基体改进剂在预热处理后对Pb、Bi和Ge三个元素分别生成金属间化合物PbPd_3、BiPd_3、Ge_9Pd_(23)和其他化合物,从而提高了最高允许灰化温度,改变了原子化机理。在原子化阶段这些金属间化合物直接分解为金属原子,结果提高测定灵敏度。
It was proved by AAS and XRD that Pb, Bi and Ge react with Pb-Mg matrix modifier to form PbPd_3, BiPd_3 and Ge_9Pd_(23) at pretreatment heating step, thereby, the maximum permissible ashing temperature increased and the atomization mechanism changed. At atomization step, these intermetallic compounds can decompose directly to metallic atoms which increase the sensitivity of tested elements.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1992年第2期209-211,共3页
Chinese Journal of Analytical Chemistry
关键词
铅
铋
锗
石墨炉
AAS
基体改进剂
Graphite furnace atomic absorption spectrometry, X-ray diffraction analysis, Palladium-magnesium matrix modiffier, Lead, Bismuth, Germanium.
