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通常在原子吸收中使校正曲线弯曲的主要因素是: (1) 光谱通带中存在非特征辐射;例如:杂散光、空心阴极灯的非特征谱线等。(2) 绕过火焰的特征辐射; (3) 光源辐射线自吸变宽; (4) 高浓度时,吸收线产生罗仑兹位移;即吸收线和发射线轮廓的中心位置不在同一波长。(5) 光谱通带内存在两条或两条以上待测元素特征谱线,其辐射能量和吸收系数不相同; (6) 使用一个宽光束系统,光束以不同的方向,即以不同的光程长度通过火焰;
The main factors that usually bend the calibration curve in atomic absorption are: (1) the presence of non-characteristic radiation in the spectral passband; for example, stray light, non-characteristic lines of hollow cathode lamps, and the like. (2) the characteristic radiation that bypasses the flame; (3) the radiation of the light source becomes wider by self-absorption; (4) the Lorentz shift of the absorption line occurs at high concentration; (5) there are two or more characteristic lines of the element to be tested in the spectral passband, and the radiation energy and absorption coefficient are different; (6) using a wide beam system, the light beams are transmitted in different directions, that is, different light Cheng length through the flame;