Eco-Friendly Analytical Approach for Sensitive Spectrofluorimetric Determination of the Flavonoid Chrysin in Capsules and Human Plasma.

Chrysin is a plant flavonoid that has different therapeutic effects as anti-inflammatory, anti-cancer, anti-oxidant, and immune booster. Spectrofluorimetry has received a lot of interest lately because of its ecological greenness and analytical performance. This approach employed the native fluorescence of chrysin at 339 nm following excitation at 231 nm in distilled water. Modern advances in analytical chemistry have been used to lessen occupational and environmental concerns by employing distilled water as a dilution solvent through method development and application. The approach was found to be excellent green supported by eco-scale score of 97 and 0.94 AGREE rating, in addition to an overall whiteness score of 88.80. The design aimed to analyze chrysin in raw materials, Chrysin® capsules and human plasma. The method was linear over 0.5-7.0 ng mL^⁻1 chrysin, with LOD of 0.06 ng mL^⁻1 and LOQ of 0.20 ng mL^⁻1. The offered method was effectively applied for determination of chrysin in the commercial capsules Chrysin® and spiked human plasma samples with average recoveries of 99.76% and 99.98%, respectively for capsules and spiked human plasma. Up to date, no spectrofluorimetric method has been described for chrysin analysis, then, this presented an opportunity to develop a sensitive, quick, reliable, environmentally friendly, and valid fluorescence-based method.