The Harvey Method of Semiquantitative Spectrochemical Analysis

Harvey developed a comprehensive method of semiquantitative spectrochemical analysis involving careful control of a large number of 

Excitation continues until the sample is completely vaporized as well as the cup part of the electrode. 

Line densities and background densities adjacent to the spectral lines are obtained using a photometric-type densitometer. 

Harvey s method requires care and attention to detail by the spectro-scopist. Among the variables that must be controlled are the following. 

FIGURE 7-6. Electrode design for semiquantitative spectrochemical analysis by the Harvey method standard cup electrode, 10 mg size. Dimensions in inches. [Courtesy Applied Research Laboratories.] 

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