The Spectrophotometric Multicomponent Analysis of a Ternary Mixture of Paracetamol, Aspirin, and Caffeine by the Double Divisor-Ratio Spectra Derivative Method

Figure 7

The coincident spectra of the first derivative of the ratio spectra of (a1) 20 μmol L⁻¹ pure ASP and (a2) ternary mixture of 20 μmol L⁻¹ ASP, 50 μmol L⁻¹ CAF, 20 μmol L⁻¹ PAR, and 2.0 μmol L⁻¹ CAF + 2.0 μmol L⁻¹ PAR as a double divisor; (b1) 50 μmol L⁻¹ pure CAF and (b2) ternary mixture of 20 μmol L⁻¹ ASP, 50 μmol L⁻¹ CAF, 20 μmol L⁻¹ PAR, and 2.0 μmol L⁻¹ ASP + 2.0 μmol L⁻¹ PAR as a double divisor; and (c1) 20 μmol L⁻¹ pure PAR and (c2) ternary mixture of 20 μmol L⁻¹ ASP, 50 μmol L⁻¹ CAF, 20 μmol L⁻¹ PAR, and 2.0 μmol L⁻¹ ASP + 2.0 μmol L⁻¹ CAF as a double divisor.