Fig. 2From: Multiple analytical methods for determination of formoterol and glycopyrronium simultaneously in their novel combined metered dose inhalerFirst-order derivative spectra of 7.2 µg/mL FF and 13.5 µg/mL GLY in methanol, Where FF measured at 208.27 nm (at zero crossing for GLY) and GLY measured at 213.27 nm and 239.86 nm (at zero crossing for FF)Back to article page