Development and Greenness Assessment of Analytical Quality by Design Optimised Eco-friendly UV Spectrophotometric Methods for Analysis of Two Natural Antioxidants in Pure and Formulation

Abstract

Utilizing analytical quality by design and green analytical chemistry principles, the present work introduces simple, robust, and environmentally benign UV methods. Two separate spectrophotometric methods were developed for the estimation of Silybin and Curcumin, where solvent, scan speed, and sampling interval are the estimated critical parameters. The detection was carried out at absorption maxima of 288nm for Silybin and 419nm for Curcumin with ethanol. To determine the critical method variables, a risk assessment was carried out using an Ishikawa diagram. Developed spectrophotometric methods were validated according to the International Council for Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use Q2 (R1) guidelines. The proposed methods showed good predictability and robustness. The new methodologies were found to be green according to the analytical greenness metric approach and software, the green analytical procedure index, and analytical eco-scale tools in comparison to the existing methods.