论文部分内容阅读
在火焰原子吸收吸光光度法中,最常用的是空气-乙炔火焰,但瓶装乙炔的供应和运输都还比较困难。目前液化石油气作为家用燃料已普遍,如能用以代替乙炔,对原子吸收分析法的广泛采用具有积极作用。与液化石油气相似的丙烷气很早就用于原子吸收分析,对原子化温度较低而容易热电离的元素有较好的效果,但对很多元素原子化效率不高,比乙炔逊色得多,因而没有得到广泛采用。在我们的试验中,以富氧空气作为助燃气,显著地改善了液化石油气火焰的分析特性,在进行试验的17个元素中,绝大多数取得了和空气-乙炔火焰相同的效果。本文着重讨论
Flame atomic absorption spectrophotometry, the most commonly used is the air - acetylene flame, but bottled acetylene supply and transport are still more difficult. Currently liquefied petroleum gas as a domestic fuel has been widespread, if can be used instead of acetylene, atomic absorption spectrometry has a positive effect on the widespread adoption. Propane gas, similar to liquefied petroleum gas, has long been used for atomic absorption spectroscopy and has been shown to be effective for elements that have a lower atomization temperature but are susceptible to thermal ionization, but are less efficient for many elements than for acetylene , It has not been widely adopted. In our experiments, the use of oxygen-enriched air as a combustion gas significantly improved the analytical characteristics of LPG flames and most of the 17 elements tested achieved the same effect as the air-acetylene flame. This article focuses on the discussion