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原子吸收光谱分析法,在环境分析中日益显示了它的重要性,其优点是灵敏度高、快速、简便,但是,常规的火焰原子吸收法提升量大,每次所用试液体积为数ml,对经过富集后的水样,由于体积小,所以测定时有一定的困难。本文在试图提高灵敏度的同时,也设法减小进样体积。为此,我们对WYX-401型原子吸收分光光度计的原子化系统进行了改制,并将助燃气体加热,电器部分也作了部分的修改。修改的仪器不但灵敏度有了显著的提高,更大的优点是由于将微量进样与加热雾室相结合,从而克服了过去连续雾化采用加热雾室时气流不稳定的缺点,也提高了系统的精度。
Atomic absorption spectrometry is increasingly important in environmental analysis and has the advantages of high sensitivity, rapidity and simplicity. However, conventional flame atomic absorption spectrometry has a large amount of lift and the volume of test solution used is several ml. After the enrichment of water samples, due to small size, so the determination of certain difficulties. This article tries to reduce the injection volume while trying to increase the sensitivity. To this end, we WYX-401 Atomic Absorption Spectrophotometer atomic system was modified, and the combustion gas heating, the electrical part has also been partially modified. The modified instrument not only has a significant increase in sensitivity, the greater advantage is due to the combination of micro-injection and heating the mist chamber, thereby overcoming the shortcomings of the instability of the gas flow in the past with continuous heating of the mist chamber, and also improves the system The accuracy.