石墨炉内石墨探针表面上的原子化机理研究——Ⅷ 锡的原子化机理  

Study on the Mechnism of Atomizaion for Tin Compound on the Graphite Probe Surface in Graphite Furnace

作　　者：王建平[1] 邓勃[1] 

机构地区：[1]清华大学化学系

出　　处：《分析测试通报》1992年第2期7-12,共6页

基　　金：国家自然科学基金

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.

关 键 词：原子化机理 石墨探针 锡 GFAAS 

分 类 号：O614.432[理学—无机化学]