Development and Validation of a Liquid Chromatography-Mass Spectrometry Assay for Determination of Cromolyn Sodium in Skin Permeation Studies

Figure 1

Negative electrospray mass spectra showing a base peak of (a) 467 m/z for CS in the precursor (MS1), as well as the chemical composition of CS and (b) 379 m/z for CS in the fragment (MS2). Abbreviations: CS, cromolyn sodium; m/z, mass to charge ratio.

(a)

(b)