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一、引言受激原子的碰撞猝灭现象在发射光谱分析和原子荧光分析中,早已发现是有干扰的。但在原子吸收分析中,通常未提及。的确在火焰原子吸收分析中,由于原子化效率低和原子在吸收空间停留时间短,碰撞猝灭现象很难发现。但在电热原子化器中,原子浓度比起火焰法要高10~3—10~4倍,碰撞猝灭现象所引起的干扰可能明显出现。
I. INTRODUCTION Collision quenching of excited atoms has long been found to be disturbing in emission spectroscopy and atomic fluorescence spectroscopy. However, in atomic absorption analysis, it is not usually mentioned. Indeed, in flame atomic absorption spectroscopy, the phenomena of collisional quenching is hard to detect due to the low atomization efficiency and the short residence time of the atoms in the absorption space. However, in an electrothermal atomizer, the concentration of atoms is 10 to 3 to 10 times higher than that of the flame method, and the interference caused by the collision quenching phenomenon may appear conspicuously.