Abstract

In estimating the total concentration of similar analytes in recalculated to the reference substance of Xst, different sensitivities of the photometric determinations of analytes and Xst result in systematic errors depending on the choice of Xst and sample composition. A method of prediction of this error is proposed and tested on model antioxidant mixtures. Its application to the analysis of mixtures with approximately known compositions allows the optimization of the choice of Xst and can improve the accuracy of estimating the total concentration of analytes.

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