摘要
利用探针原子化技术,研究了在普通石墨管中锡化合物的原子化过程中所发生的化学反应,阐述了锡的原子化机理。结果表明,锡试样首先转化成为氧化物,氧化物发生石墨碳还原而生成气态原子。
The change of chemical species in the atomization process of stannous chloride on the gra-
phite probe surface are determined by X-ray diffraction spectrometry (XRD) auger electron spe-
ctroscopy (AES), electron spectroscopy for chemical analysis (ESCA) and scanning electron
micrography (SEM). It is shown that when aqueous solution of SnCl_2 is heated on the graphite
probe, SnO_2 and SnO are formed at relatively low temperature. These oxides are then reduced
to metal Sn by carbon on the probe surface. The atomization mechanism for stannous chloride
during its heat treatment on probe surface in the graphite furnace are proposed.
基金
国家自然科学基金
