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

Figure 3

Typical chromatograms of: (a) permethrin working standard solution (10 µg/mL) and after degradation under: (b) heat condition; (c) acidic hydrolysis: peaks 3, 4, 5, and 6 = degraded forms; (d) basic hydrolysis: peaks 3, 4, and 5 degraded forms; (e) oxidative condition: peak 3 = hydrogen peroxide; (f) photolytic condition: Peak 1 = trans-, peak 2 = cis-isomers.

(a)

(b)

(c)

(d)

(e)

(f)