摘要
本文叙述了平台石墨炉原子吸收法测定麦芽粉中的锗和硒,采用Pd+Ni和Pd基体改进剂,使锗和硒的灰化温度分别提高到1400和1200℃,有效地消除了基体干扰。方法特征量为31pg(Ge)和23pg(Se),检出限为28pgGe和62pgSe(3σ)。对含22~110μg/gGe和18~35μg/gSe的样品测定,相对标准偏差为Ge3.7~5.6%(n=9),Se4.3~6.5%(n=9),回收率在90~105%之间。
A method for determination of germanium and selenium in malt powder has been developed by graphite furnace atomic absorption spectrometry with L′vov platform.While (Pd+Ni) and Pd were used as matrix modifiers,the ashing temperatures of Ge and Se were increased to 1400 and 1200℃ respectively,and the matrix inferences were removed.The characteristic masses are 31pg Ge and 23pg Se(0 0044A),the detection limits are 28pg Ge and 62pg Se(3σ),the precisions (n=9) are 3 7—5 6%(Ge) and 4 3—6 5%(Se) and the recoveries are among 90—105%.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1998年第6期703-706,共4页
Spectroscopy and Spectral Analysis
关键词
平台石墨炉
原子吸收
麦芽粉
锗
硒
测定
Graphite furnace, Atomic absorption spectrometry, Malt powder, Germanium, Selenium