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样品基体引起的非特征吸收往往是限制原子吸收光谱法分析准确度的主要因素。1965年,Koirthyohann和Picket提出了利用连续辐射光源(如氘放电灯)的背景校正系统。如今在原子吸收光谱仪器上,尤其是无火焰原子化的情况下,这种背景校正系统已成为标准配件。但是,应用背景校正系统却需要有丰富的经验,因为在分子带引起有精细结构的背景时,它们可能导致虚假的校正。另外,它们不能在整个波长范围内采用,而且氘灯辐射强度低,要求初级线光谱辐射光源也在对应的辐射强度下工作,以便使两者的辐射光谱输出相匹配,因此可能限制低含量元素的检测能力。
Non-characteristic absorption caused by the sample matrix is often the main factor limiting the accuracy of atomic absorption spectrometry analysis. In 1965, Koirthyohann and Picket proposed a background correction system that uses continuous radiation sources such as deuterium discharge lamps. Background correction systems have become standard accessories today for atomic absorption spectroscopy, especially in the absence of flame atomization. However, applying a background correction system requires a wealth of experience, as they may cause false corrections when the molecular band causes a finely structured background. In addition, they can not be used over the entire wavelength range and the deuterium lamp radiation intensity is low, requiring that the primary line spectral radiation sources also operate at the corresponding radiation intensities in order to match the radiation spectral output of the two and therefore may limit the amount of low content elements The detection ability.