Abstract

The spectrographic properties of the sample and the characteristics of the photographic emulsion can be taken into account simultaneously through a parameter, α, representing the slope of the analytical curve. This paper describes an analytical procedure (the <i>parametric method</i>) that introduces into the calculation α of the function instead of γ of the photographic emulsion. This substitution of parameters leads to automation of the spectrochemical calculations. The unknown concentration of an element can be calculated with a standard formula, free of γ by making use of a digital computer or by plotting analytical curves on the "Spectro-nomograph" chart directly from transmissions. In both cases this technique eliminates the determination of the intensity ratios. The principles of the method and the mathematical derivation of the chart are given.

Effect of Stray Light in Prism and Grating Spectrographs on Emulsion Calibration Curves and Its Significance in Spectrographic Analysis*

Richard N. Kniseley and Velmer A. Fassel
J. Opt. Soc. Am. 44(5) 390-393 (1954)

Emulsion Calibration Scale for Quantitative Spectroscopic Analysis

Harold K. Hughes and R. W. Murphy
J. Opt. Soc. Am. 39(6) 501-504 (1949)

Characteristic curves for photographic emulsions from nonlinear fitting: a study of statistical and model error

Joel Tellinghuisen
Appl. Opt. 30(13) 1723-1729 (1991)

Investigations of the Exposure Scales of Characteristic Curves of Photographic Emulsion Layers*

A. P. H. Trivelli
J. Opt. Soc. Am. 42(7) 467-474 (1952)

The Effect of Light-Absorption on the Shape of the Photographic H. and D. Curve*

J. H. Webb
J. Opt. Soc. Am. 38(1) 27-34 (1948)