maximum absorption for paracetamol
As shown in Figure 1, the absorption spectra of paracetamol, aspirin, and caffeine overlapped in the wavelength range of 220â320ânm. Therefore, double divisor-ratio spectra derivative method proposed for simultaneous determination of compounds in ternary samples.igure 4: First-derivative double divisor-ratio spectra for a ternary mixture of aspirin, caffeine, and paracetamol after simultaneous standard addition of three components in the concentration range of 10â60 Î¼ molâL â1.