Читать книгу Chemical Analysis - Francis Rouessac - Страница 57

This method, also called percentage normalization, is used for mixtures in which all components have been identified and have been assigned a well‐resolved peak on the chromatogram. This method uses relative response factors, as in the internal standard method. The biggest difference here is that the solute used as a reference to calculate the relative response factor is part of the mixture to quantify.

Let us suppose that we are trying to find the mass concentrations of three compounds 1, 2, 3 in a mixture (Figure 1.14). The analysis is again carried out in two steps.