Mathematically Processed UV Spectroscopic Method for Quantification of Chlorthalidone and Azelnidipine in Bulk and Formulation: Evaluation of Greenness and Whiteness

Figure 4

(a) Ratio first derivate spectra of pure CTL (blue) and mixture (red), (b) Ratio first derivate spectra of pure AZE (blue) and mixture (red). (c) Ratio first derivative spectra of CTL (1–15 μg/mL). (d) Ratio first derivative spectra of AZE (1–15 μg/mL).

(a)

(b)

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(d)