Simultaneous Determination of Caffeine and Chlorogenic Acids in Green Coffee by UV/Vis Spectroscopy

Figure 3

Chromatographic analysis for caffeine (a) and CGA (b). In the left the profiles of elution registered at the maximum of absorbance for caffeine or CGA as function of the retention time. The inset shows the spectrum at the maximum of peak. In the right, the calibration curves obtained by plotting the peak area as function of the concentration of injected sample. The lines represent the linear fit.

(a)

(b)