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钢铁中锡的测定,主要是用苯芴酮和邻苯二酚紫吸光光度法,但钼含量较大时有干扰。而用空气-乙炔焰原子吸收法测定灵敏度较低,需经萃取分离富集,分析步骤较繁。目前多用石墨炉或气相氢化物发生原子吸收吸光光度法测定微量锡。郭小伟等提出同心双毛细管喷雾器用于氢化物发生直接火焰原子吸收法,操作简便,灵敏度比非氢化物发生法提高10倍以上,但比气相氢化物发生-电热石英管原子化测定法低1～2数量级,为了提高同心双毛细管氢化物发生火焰原子吸收法的灵敏度,采用原子吸收信号的微分测定法。因为火焰原子吸收微分测定法的灵敏度比传统的
Determination of tin in steel, mainly benzene fluorenone and pyrocatechin violet absorption spectrophotometry, but there is interference when larger molybdenum content. The air - acetylene flame atomic absorption method for the determination of low sensitivity, to be enriched by extraction, analysis of more complicated steps. At present more graphite furnace or gas hydride atomic absorption spectrophotometry trace tin. Guo Xiaowei et al proposed a concentric double capillary atomizer for direct hydride flame atomic absorption spectrometry, which was simple and convenient to operate. The sensitivity was improved more than 10 times than that of non-hydride generation method, but lower than that of gas hydride generation- 2 order of magnitude, in order to improve concentric double capillary hydride flame atomic absorption spectrometry sensitivity, the use of atomic absorption signal differential determination method. Because flame atomic absorption differential determination of sensitivity than the traditional