Abstract

Various devices are used to reduce the labor of calculating the concentrations of components with mutually interfering bands in quantitative infrared analysis. Computers <i>(7)</i> or IBM equipment <i>(8,10)</i> may be used for complex systems, or successive approximation methods <i>(3,5,11)</i> may be satisfactory. For systems of two or three components, exact solutions can be obtained by solving simultaneous equations <i>(4,6),</i> but such a procedure becomes tedious when large numbers of samples are involved. It is the purpose of this note to point out that nomographs can be easily constructed which give exact solutions to these simultaneous equations with a minimum of effort. Several forms of nomographs have been suggested for this purpose <i>(2,9,12),</i> but the type described here seems to offer some advantages in ease of construction and use.

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