摘要
本文从热力学和化学动力学的角度对消除干扰及提高吸收灵敏度的机理进行了探讨。认为在涂钼石墨管中,镓、铟和铊主要以Ga_2O、Tl_2O和InOx形式与MoO_3形成稳定的烧结物,使初始挥发温度大大提高,减少了干燥、灰化前处理过程被测物的分子挥发逸失。由于钼元素参与镓、铟和铊的原子化反应,从而改变了原子化机理,提高了原子化效率。
The mechanism of removing interference and enhancing absorption sensitivity has been studied from thermodynamic and kinetic considerations. Gallium, indium and thallium in Mo-coated graphite tube form mainly stable sintered materical in the form of Ga_2O, T1_2O and InO_X, with MoO_3 to enhance greatly initial volatilization temperature and decrease process that molecular species escaped before drying and ashing. Because molybdenum participated in atomization reaction of gallium, indium and thallium, it can change atomization mechanism and improve atomization efficiency.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1994年第5期512-515,共4页
Chinese Journal of Analytical Chemistry
关键词
涂钼
石墨管
镓
铟
铊
热蒸发行为
Molybdenum-coated graphite tube, Gallium, Indium, Thallium, Evaporation behaviour
