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(四)沃尔什原子吸收法沃尔什(Walsh)原子吸收法又称峰值吸收法。是上述线吸收法中的一个特例,即α《1的特殊情况。其特点是由测定对一个线光源吸收的相对值来决定待测体系的浓度。一、沃尔什原子吸收法的特点和优点:沃尔什把原子吸收技术引入定量化学分析的关键是要解决这样一个难题,即:如何能用一个分辨率不很高的单色仪来完成一个给定吸收的测定。为了在连续白光中测量一个吸收,通常需要高达500000的分辨能力。而这种数量级的分辨能力只有 Fabry-Perot 干涉仪才能达到。或者将光谱狭缝宽度调到非常小,光谱通带(它正比
(D) Walsh atomic absorption method Walsh (Walsh) atomic absorption method, also known as peak absorption method. Is a special case of the above line absorption method, that is, the special case of α "1. It is characterized by the determination of the relative absorption of a linear light source to determine the concentration of the system under test. First, the Walsh AAS characteristics and advantages: Walsh atomic absorption technology into the quantitative chemical analysis of the key is to solve such a problem, that is: how to use a resolution is not very high monochromator to complete A given absorption measurement. In order to measure an absorption in continuous white light, resolution of up to 500,000 is usually required. This order of magnitude resolution is only achieved with Fabry-Perot interferometers. Or the spectral slit width is tuned to a very small, spectral passband (which is proportional