Different Spectrophotometric Methods Manipulating Ratio Spectra Applied for the Analysis of Aclidinium in Duaklir^® Genuair^® Inhalation Powder

Figure 5

Ratio spectra of laboratory-prepared mixtures of aclidinium (5–40 µg/mL) and formoterol (5–10 µg/mL) using 8 µg/mL of formoterol as a divisor.