炎吸収スペクトル用2フレーム自記分光光度計におけるバックグラウンド補正

概要

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A new type of two-flames double-beam spectrophotometer for flame absorption spectra has been built, which is equipped with a deuterium lamp, a tungusten lamp and a hollow cathode lamp. The apparatus was applied to the measurement of the absorption spectrum in the ultra-violet region {(280〜320)nm} in the air-acetylene flame with aspirating the aqueous solution of Mg (500μg/ml), and the obtained spectrum is shown in Fig. 1 along with that taken by the one-flame system. In the spectrum observed by the one-flame system, the molecular absorption bands of OH are observed near (280〜290) and (305〜320) nm. 0n the other hand, the absorptions of OH disappear completely, leaving that of Mg at 285.2 nm in the spectrum by the two-flames system. this ihdicates that the background absorption due to the flame components and the co-existing species in solution can be automatically corrected by the use of this two-flames double-beam spectrophotometer. The two-flames system can also be useful to a certain extent for correcting the change of the baseline due to that of the intensity of the light source.
1975-06-10