An Ecofriendly and Stability-Indicating HPLC Method for Determination of Permethrin Isomers: Application to Pharmaceutical Analysis

Figure 2

Chromatograms of permethrin obtained using the mobile phase, consisting of: (a) ethanol : water (70 : 30, v/v); (b) ethanol : water (65 : 35, v/v) and (c) ethanol : phosphoric acid solution (pH = 3) (67 : 33, v/v). Peak 1 = trans-, peak 2 = cis-isomers.

(a)

(b)

(c)