Only one component absorbs within the wavelength range

2 Only one component absorbs within the wavelength range 

If only C absorbs the absorbances in the absorbance diagram are also situated on a zero point line. The measurement starts in the zero point and ends at c . One can determine from the diagram y, = c/c , if the section Al is intersected with the ratio y,. to 1. The resulting point is connected with the related point P of measurement. Then one has determined the parallel to the section AB. If this parallel is a tangent to the curve in A one of the reactions 1-4 will take place. If the parallel is not a tangent, one of the reactions 5-10 is going to happen. 

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